ui-blob: don't segfault when no path is given

It it possible to inspect blobs by specifying only the SHA-1, and CGit
provides links to do so, for example if a tag points directly at a blob.
In this case the path_items structure is never used, but creating it
still causes strlen to be run on a null pointer.  Fix this.

This error was introduced by commit c1633c6 (Update git to v1.7.6.5 -
2013-03-02).

Signed-off-by: John Keeping <john@keeping.me.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/ui-blob.c b/ui-blob.c
index c59fbcb..7aec0b1 100644
--- a/ui-blob.c
+++ b/ui-blob.c
@@ -80,7 +80,7 @@ void cgit_print_blob(const char *hex, char *path, const char *head)
         struct commit *commit;
         struct pathspec_item path_items = {
                 .match = path,
-                .len = strlen(path)
+                .len = path ? strlen(path) : 0
         };
         struct pathspec paths = {
                 .nr = 1,