send-email: don't call methods on undefined values

diff --git a/read-cache.c b/read-cache.c
index d5201f9b06c3f5ac53b8a6f5396fbf3392f1b3b2..d4474eab7b6f9ffbfb4e7da23d284c936f488276 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -722,7 +722,7 @@ struct cache_entry *make_cache_entry(unsigned int mode,
        return ce;
 }
 
-int ce_same_name(struct cache_entry *a, struct cache_entry *b)
+int ce_same_name(const struct cache_entry *a, const struct cache_entry *b)
 {
        int len = ce_namelen(a);
        return ce_namelen(b) == len && !memcmp(a->name, b->name, len);