ext/zip: Fix const-generic compile warning

Author: ndossche

ext/zip/zip_stream.c

@@ -125,12 +125,11 @@ static int php_zip_ops_stat(php_stream *stream, php_stream_statbuf *ssb) /* {{{
 	size_t path_len = strlen(stream->orig_path);
 	char file_dirname[MAXPATHLEN];
 	struct zip *za;
-	char *fragment;
 	size_t fragment_len;
 	int err;
 	zend_string *file_basename;
 
-	fragment = strchr(path, '#');
+	const char *fragment = strchr(path, '#');
 	if (!fragment) {
 		return -1;
 	}
@@ -286,14 +285,13 @@ php_stream *php_stream_zip_opener(php_stream_wrapper *wrapper,
 
 	struct zip *za;
 	struct zip_file *zf = NULL;
-	char *fragment;
 	size_t fragment_len;
 	int err;
 
 	php_stream *stream = NULL;
 	struct php_zip_stream_data_t *self;
 
-	fragment = strchr(path, '#');
+	const char *fragment = strchr(path, '#');
 	if (!fragment) {
 		return NULL;
 	}