ui-shared: fix segfault when defbranch is NULL

Not sure if there's a better fix for this.  defbranch is
NULL here on my setup when a crawler hit an invalid URL,
causing strcmp to segfault.

Signed-off-by: Eric Wong <normalperson@yhbt.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/ui-shared.c b/ui-shared.c
index b1a6c46..e39d004 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -253,7 +253,7 @@ static char *repolink(const char *title, const char *class, const char *page,
                 }
                 delim = "&";
         }
-        if (head && strcmp(head, ctx.repo->defbranch)) {
+        if (head && ctx.repo->defbranch && strcmp(head, ctx.repo->defbranch)) {
                 html(delim);
                 html("h=");
                 html_url_arg(head);