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-files.c b/diff-files.c
index 28f1b13..54dd8bf 100644
--- a/diff-files.c
+++ b/diff-files.c
@@ -121,7 +121,7 @@
 			show_file('-', ce);
 			continue;
 		}
-		changed = cache_match_stat(ce, &st);
+		changed = ce_match_stat(ce, &st);
 		if (!changed)
 			continue;