minor fix converting path variable from string to pathname

[anquegi]

I make this change because using with roswell it gives me the following error:

Unhandled SIMPLE-TYPE-ERROR:
The value of CL-PROJECT::PATH is "/Users/toni/learn/emacs/my-project", which is not of type PATHNAME.

since pathname is a function specified in cltl2 I think that this should work in all common lisp implementations

Long Traces

 2017-02-22 14:53:07 ☆ |ruby-2.3.1@learn| Antonios-MacBook-Pro in ~/learn/emacs
○ → make-project /Users/toni/learn/emacs/my-project --name my-project --description "sample project" --license LLGPL --depends-on alexandria jonathan dexador
Unhandled SIMPLE-TYPE-ERROR:
  The value of CL-PROJECT::PATH is "/Users/toni/learn/emacs/my-project", which is not of type PATHNAME.

Backtrace for: #<SB-THREAD:THREAD "main thread" RUNNING {1002DE7773}>
0: ((LAMBDA NIL :IN SB-DEBUG::FUNCALL-WITH-DEBUG-IO-SYNTAX))
1: (SB-IMPL::CALL-WITH-SANE-IO-SYNTAX #<CLOSURE (LAMBDA NIL :IN SB-DEBUG::FUNCALL-WITH-DEBUG-IO-SYNTAX) {10050C003B}>)
2: (SB-IMPL::%WITH-STANDARD-IO-SYNTAX #<CLOSURE (LAMBDA NIL :IN SB-DEBUG::FUNCALL-WITH-DEBUG-IO-SYNTAX) {10050C000B}>)
3: (PRINT-BACKTRACE :STREAM #<SYNONYM-STREAM :SYMBOL SB-SYS:*STDERR* {10001530A3}> :START 0 :FROM :INTERRUPTED-FRAME :COUNT NIL :PRINT-THREAD T :PRINT-FRAME-SOURCE NIL :METHOD-FRAME-STYLE NIL)
4: (SB-DEBUG::DEBUGGER-DISABLED-HOOK #<SIMPLE-TYPE-ERROR expected-type: PATHNAME datum: "/Users/toni/learn/emacs/my-project"> #<unavailable argument>)
5: (SB-DEBUG::RUN-HOOK *INVOKE-DEBUGGER-HOOK* #<SIMPLE-TYPE-ERROR expected-type: PATHNAME datum: "/Users/toni/learn/emacs/my-project">)
6: (INVOKE-DEBUGGER #<SIMPLE-TYPE-ERROR expected-type: PATHNAME datum: "/Users/toni/learn/emacs/my-project">)
7: (ERROR #<SIMPLE-TYPE-ERROR expected-type: PATHNAME datum: "/Users/toni/learn/emacs/my-project">)
8: (SB-KERNEL:CHECK-TYPE-ERROR CL-PROJECT::PATH "/Users/toni/learn/emacs/my-project" PATHNAME NIL)
9: (CL-PROJECT:MAKE-PROJECT #<unavailable argument> #<unavailable &REST argument> :NAME #<unused argument> :DESCRIPTION #<unused argument> :AUTHOR #<unused argument> :EMAIL #<unused argument> :LICENSE #<unused argument> :DEPENDS-ON #<unused argument> :WITHOUT-TESTS #<unused argument>)
10: (SB-INT:SIMPLE-EVAL-IN-LEXENV (APPLY (QUOTE MAIN) ROSWELL:*ARGV*) #<NULL-LEXENV>)
11: (SB-INT:SIMPLE-EVAL-IN-LEXENV (ROSWELL:QUIT (APPLY (QUOTE MAIN) ROSWELL:*ARGV*)) #<NULL-LEXENV>)
12: (EVAL-TLF (ROSWELL:QUIT (APPLY (QUOTE MAIN) ROSWELL:*ARGV*)) NIL #<NULL-LEXENV>)
13: ((FLET SB-FASL::EVAL-FORM :IN SB-INT:LOAD-AS-SOURCE) (ROSWELL:QUIT (APPLY (QUOTE MAIN) ROSWELL:*ARGV*)) NIL)
14: (SB-INT:LOAD-AS-SOURCE #<CONCATENATED-STREAM :STREAMS NIL {1004333B83}> :VERBOSE NIL :PRINT NIL :CONTEXT "loading")
15: ((FLET SB-FASL::LOAD-STREAM :IN LOAD) #<CONCATENATED-STREAM :STREAMS NIL {1004333B83}> NIL)
16: (LOAD #<CONCATENATED-STREAM :STREAMS NIL {1004333B83}> :VERBOSE NIL :PRINT NIL :IF-DOES-NOT-EXIST T :EXTERNAL-FORMAT :DEFAULT)
17: ((FLET ROSWELL::BODY :IN ROSWELL:SCRIPT) #<SB-SYS:FD-STREAM for "file /Users/toni/.roswell/bin/make-project" {100432CDD3}>)
18: (ROSWELL:SCRIPT :SCRIPT "/Users/toni/.roswell/bin/make-project" "/Users/toni/learn/emacs/my-project" "--name" "my-project" "--description" "sample project" "--license" "LLGPL" "--depends-on" "alexandria" "jonathan" "dexador")
19: (ROSWELL:RUN ((:EVAL "(ros:quicklisp)") (:SCRIPT "/Users/toni/.roswell/bin/make-project" "/Users/toni/learn/emacs/my-project" "--name" "my-project" "--description" "sample project" "--license" "LLGPL" "--depends-on" "alexandria" "jonathan" ...) (:QUIT NIL)))
20: (SB-INT:SIMPLE-EVAL-IN-LEXENV (ROSWELL:RUN (QUOTE ((:EVAL "(ros:quicklisp)") (:SCRIPT "/Users/toni/.roswell/bin/make-project" "/Users/toni/learn/emacs/my-project" "--name" "my-project" "--description" "sample project" "--license" "LLGPL" "--depends-on" "alexandria" "jonathan" ...) (:QUIT NIL)))) #<NULL-LEXENV>)
21: (EVAL (ROSWELL:RUN (QUOTE ((:EVAL "(ros:quicklisp)") (:SCRIPT "/Users/toni/.roswell/bin/make-project" "/Users/toni/learn/emacs/my-project" "--name" "my-project" "--description" "sample project" "--license" "LLGPL" "--depends-on" "alexandria" "jonathan" ...) (:QUIT NIL)))))
22: (SB-IMPL::PROCESS-EVAL/LOAD-OPTIONS ((:EVAL . "(progn #-ros.init(cl:load \"/usr/local/Cellar/roswell/17.1.8.73/etc/roswell/init.lisp\"))") (:EVAL . "(ros:run '((:eval\"(ros:quicklisp)\")(:script \"/Users/toni/.roswell/bin/make-project\"\"/Users/toni/learn/emacs/my-project\"\"--name\"\"my-project\"\"--description\"\"sample project\"\"--license\"\"LLGPL\"\"--depends-on\"\"alexandria\"\"jonathan\"\"dexador\")(:quit ())))")))
23: (SB-IMPL::TOPLEVEL-INIT)
24: ((FLET #:WITHOUT-INTERRUPTS-BODY-85 :IN SAVE-LISP-AND-DIE))
25: ((LABELS SB-IMPL::RESTART-LISP :IN SAVE-LISP-AND-DIE))

unhandled condition in --disable-debugger mode, quitting

Changing that I can build projects:

 2017-02-22 14:53:31 ☆ |ruby-2.3.1@learn| Antonios-MacBook-Pro in ~/learn/emacs
○ → make-project /Users/toni/learn/emacs/my-project --name my-project --description "sample project" --license LLGPL --depends-on alexandria jonathan dexador
writing /Users/toni/learn/emacs/my-project/my-project.asd
writing /Users/toni/learn/emacs/my-project/my-project-test.asd
writing /Users/toni/learn/emacs/my-project/README.org
writing /Users/toni/learn/emacs/my-project/README.markdown
writing /Users/toni/learn/emacs/my-project/.gitignore
writing /Users/toni/learn/emacs/my-project/src/my-project.lisp
writing /Users/toni/learn/emacs/my-project/t/my-project.lisp

[madand]

The issue is more cleanly resolved by #22. Since the underlying call of uiop:ensure-directory-pathname actually supports string input.

Also this is a duplicate of #21.