Remove static from _caca_alloc2d

src/common-image.c

@@ -30,7 +30,7 @@ static unsigned int u32fread(caca_file_t *);
 static unsigned int u16fread(caca_file_t *);
 static unsigned int u8fread(caca_file_t *);
 
-static void *_caca_alloc2d(size_t width, size_t height, size_t elem_size)
+void *_caca_alloc2d(size_t width, size_t height, size_t elem_size)
 {
     if (width == 0 || height == 0 || elem_size == 0 || SIZE_MAX / width / height < elem_size)
         return NULL;