Subject: Prevent negative array index for realColumn in calcPosition()
From: Tatsuya Kinoshita <tats@debian.org>
Bug-Debian: https://github.com/tats/w3m/issues/69
Origin: https://anonscm.debian.org/cgit/collab-maint/w3m.git/commit/?id=1978455e2ed01699789e8374d29515b74b867b2b

---
 etc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/etc.c b/etc.c
index 8fe1215..af8a5d3 100644
--- a/etc.c
+++ b/etc.c
@@ -498,7 +498,7 @@ calcPosition(char *l, Lineprop *pr, int len, int pos, int bpos, int mode)
     static char *prevl = NULL;
     int i, j;
 
-    if (l == NULL || len == 0)
+    if (l == NULL || len == 0 || pos < 0)
 	return bpos;
     if (l == prevl && mode == CP_AUTO) {
 	if (pos <= len)
-- 
2.10.2