fix caching bug, thankt to rrichards

diff --git a/http_send_api.c b/http_send_api.c
index 4f97dac1c07d7e8471688bf3f21a78a9fc813957..26bf22d3e0a00694ce1b71ecfb3b1aa8bb7fc065 100644 (file)
--- a/http_send_api.c
+++ b/http_send_api.c
@@ -478,7 +478,7 @@ PHP_HTTP_API STATUS _http_send_ex(const void *data_ptr, size_t data_size, http_s
                        }
                
                        /* send 304 Not Modified if last modified matches */
-                       if (!no_cache && http_match_last_modified("HTTP_IF_MODIFIED_SINCE", HTTP_G->send.last_modified)) {
+                       if (!no_cache && HTTP_G->send.last_modified && http_match_last_modified("HTTP_IF_MODIFIED_SINCE", HTTP_G->send.last_modified)) {
                                char *sent_header = NULL;
                                http_send_last_modified_ex(HTTP_G->send.last_modified, &sent_header);
                                return http_exit_ex(304, sent_header, NULL, 0);