Save errno in handle_alias()

diff --git a/merge-index.c b/merge-index.c
index 190e12fb7ceeb012a063f8c97b574e9650d95cc1..0498a6f45e53947e356c6a390869d3f8194f05b7 100644 (file)
--- a/merge-index.c
+++ b/merge-index.c
@@ -1,5 +1,6 @@
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <signal.h>
 
 #include "cache.h"