ui-log: Prevent crash when given empty range search

Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/ui-log.c b/ui-log.c
index bc0c02c..b9771fa 100644
--- a/ui-log.c
+++ b/ui-log.c
@@ -161,9 +161,9 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
                 tip = ctx.qry.head;
 
         argv[1] = disambiguate_ref(tip);
 
-        if (grep && pattern) {
+        if (grep && pattern && *pattern) {
                 if (!strcmp(grep, "grep") || !strcmp(grep, "author") ||
                     !strcmp(grep, "committer"))
                         argv[argc++] = fmt("--%s=%s", grep, pattern);
                 if (!strcmp(grep, "range"))