From f9e7750621ca5e067f58a679caff5ff2f9881c4c Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Wed, 8 Jun 2005 11:31:53 -0700
Subject: Fix SIGSEGV on unmerged files in git-diff-files -p

NULL is not considered a VALID pathspec.

diff --git a/diffcore.h b/diffcore.h
index f1b5ca7..ac159d7 100644
--- a/diffcore.h
+++ b/diffcore.h
@@ -33,7 +33,7 @@ struct diff_filespec {
 				  * if false, use the name and read from
 				  * the filesystem.
 				  */
-#define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
+#define DIFF_FILE_VALID(spec) ((spec) && ((spec)->mode) != 0)
 	unsigned should_free : 1; /* data should be free()'ed */
 	unsigned should_munmap : 1; /* data should be munmap()'ed */
 };
-- 
cgit v0.10.2-6-g49f6