lib: add clear function for pointer arrays.

src/structures/array.h

@@ -74,6 +74,7 @@ void                    cry_ptr_array_append(struct CryPtrArray* array, pointer
 return_code             cry_ptr_array_insert(struct CryPtrArray* array, size_t index, pointer ptr);
 pointer                 cry_ptr_array_remove(struct CryPtrArray* array, size_t index);
 pointer			cry_ptr_array_replace(struct CryPtrArray* array, size_t index, pointer ptr);
+void			cry_ptr_array_clear(struct CryPtrArray* array, cry_free_funptr fun);
 
 pointer                 cry_ptr_array_get(struct CryPtrArray* array, size_t index);