ls-files: don't try to prune an empty index

diff --git a/builtin/check-mailmap.c b/builtin/check-mailmap.c
index cf0f54f6b92ec8db45158c43ad164413ec4a1333..cdce144f3b7f160f508721ed4f4afc69d683262a 100644 (file)
--- a/builtin/check-mailmap.c
+++ b/builtin/check-mailmap.c
@@ -1,4 +1,5 @@
 #include "builtin.h"
+#include "config.h"
 #include "mailmap.h"
 #include "parse-options.h"
 #include "string-list.h"