hook: use correct logical variable

diff --git a/builtin/diff-index.c b/builtin/diff-index.c
index d59bf6cf5f8da394251532765f27a044c14a572d..185e6f9b582fdcf15072038b570463a0cfb1bbf2 100644 (file)
--- a/builtin/diff-index.c
+++ b/builtin/diff-index.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "config.h"
 #include "diff.h"
 #include "commit.h"
 #include "revision.h"