add a little more complex case with a loop block

a modified copy from toywasm.

Author: yamt

test/core/try_table.wast

@@ -376,3 +376,27 @@
   )
   "type mismatch"
 )
+
+(module
+  (tag $e (param i32))
+  (func $dec-and-throw (param i32)
+    local.get 0
+    i32.eqz
+    br_if 0
+    local.get 0
+    i32.const 1
+    i32.sub
+    throw $e
+  )
+  (func $loop (export "loop") (param i32)
+    local.get 0
+    loop (param i32)
+      try_table (param i32) (catch $e 0)
+        call $dec-and-throw
+      end
+    end
+  )
+)
+
+(assert_return (invoke "loop" (i32.const 0)))
+(assert_return (invoke "loop" (i32.const 1000000)))