fix: zpl_buffer_copy_init call

Author: zpl-zak

CHANGELOG

@@ -1,3 +1,4 @@
+19.0.4  - fix: zpl_buffer_copy_init missing macros (thanks Ed_ on Discord)
 19.0.3  - fix: zpl_str_skip_literal reading before start of string (mbenniston)
 19.0.2  - fixed ZPL_ISIZE_MIN and MAX for 32-bit architectures (mrossetti)
 19.0.1  - Fixed zpl_array_fill ZPL_ASSERT off-by-one error

code/header/essentials/collections/buffer.h

@@ -33,6 +33,7 @@ typedef struct zpl_buffer_header {
 #define zpl_buffer_count(x)    (ZPL_BUFFER_HEADER(x)->count)
 #define zpl_buffer_capacity(x) (ZPL_BUFFER_HEADER(x)->capacity)
 #define zpl_buffer_end(x) (x + (zpl_buffer_count(x) - 1))
+#define zpl_buffer_allocator(x) (ZPL_BUFFER_HEADER(x)->backing)
 
 #define zpl_buffer_init(x, allocator, cap)                                                                             \
 do {                                                                                                               \
@@ -60,7 +61,7 @@ do {
 
 #define zpl_buffer_copy_init(y, x)                                                                                     \
 do {                                                                                                               \
-    zpl_buffer_init_reserve(y, zpl_buffer_allocator(x), zpl_buffer_capacity(x));                                   \
+    zpl_buffer_init(y, zpl_buffer_allocator(x), zpl_buffer_capacity(x));                                   \
     zpl_memcopy(y, x, zpl_buffer_capacity(x) * zpl_size_of(*x));                                                   \
     zpl_buffer_count(y) = zpl_buffer_count(x);                                                                     \
 } while (0)