From 82de39b7d59e7863a878f87803d6d1b3346bbf8e Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Tue, 17 Sep 2013 15:33:12 +0200
Subject: [PATCH] find_subfiles: fix really dumb bug causing segfaults

NULL pointer deref when a .sub file with the same filename as the video
file was present.

I was probably half asleep when writing this code.
---
 sub/find_subfiles.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sub/find_subfiles.c b/sub/find_subfiles.c
index 691c0148d3..a5b1bdeb22 100644
--- a/sub/find_subfiles.c
+++ b/sub/find_subfiles.c
@@ -208,7 +208,7 @@ static void filter_subidx(struct subfn **slist, int *nsub)
         if (case_endswith(fname, ".idx")) {
             prev = fname;
         } else if (case_endswith(fname, ".sub")) {
-            if (strncmp(prev, fname, strlen(fname) - 4) == 0)
+            if (prev && strncmp(prev, fname, strlen(fname) - 4) == 0)
                 (*slist)[n].priority = -1;
         }
     }