Rename cache_match_stat() to ce_match_stat()

Signed-off-by: Brad Roberts <braddr@puremagic.com>
Signed-off-by: Petr Baudis <pasky@ucw.cz>
diff --git a/diff.c b/diff.c
index 26b53cc..a237311 100644
--- a/diff.c
+++ b/diff.c
@@ -175,7 +175,7 @@
 	ce = active_cache[pos];
 	if ((lstat(name, &st) < 0) ||
 	    !S_ISREG(st.st_mode) ||
-	    cache_match_stat(ce, &st) ||
+	    ce_match_stat(ce, &st) ||
 	    memcmp(sha1, ce->sha1, 20))
 		return 0;
 	return 1;