zlib: no need to free dict on inflate init error

This was introduced in b0ef5fc because
it added `efree(dict)` to both inflate and deflate error handling.
But this is only necessary for the deflate case, not the inflate case
(as also shown in the original leak report).

Author: ndossche

ext/zlib/zlib.c

@@ -908,7 +908,7 @@ PHP_FUNCTION(inflate_init)
 	}
 
 	if (inflateInit2(&ctx->Z, encoding) != Z_OK) {
-		efree(dict);
+		/* dict is stored in the ctx in the object and will thus be freed by zval_ptr_dtor(). */
 		zval_ptr_dtor(return_value);
 		php_error_docref(NULL, E_WARNING, "Failed allocating zlib.inflate context");
 		RETURN_FALSE;