use xmallocz to avoid size arithmetic

diff --git a/refs.c b/refs.c
index e2d34b253e4c9c4efcb30e88d11ccd3ce9e14deb..1d9e2a7932413a31fde81512ddcfdb7655209b1e 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -124,7 +124,7 @@ int refname_is_safe(const char *refname)
                char *buf;
                int result;
 
-               buf = xmalloc(strlen(refname) + 1);
+               buf = xmallocz(strlen(refname));
                /*
                 * Does the refname try to escape refs/?
                 * For example: refs/foo/../bar is safe but refs/foo/../../bar