# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1397302977 -7200
# Node ID 75ee459ba9414c51679bfbe40d857ee0ec6a6924
# Parent  bcf624518909d9392bf440fd4177e2a67b6cb007
fixed memory underflow bug in mvwasyncgetnstr

diff -r bcf624518909 -r 75ee459ba941 src/input.c
--- a/src/input.c	Thu Apr 10 12:10:09 2014 +0200
+++ b/src/input.c	Sat Apr 12 13:42:57 2014 +0200
@@ -58,7 +58,9 @@
             return 1;
         case KEY_BACKSPACE:
         case KEY_LEFT:
-            str[--(*pos)] = '\0';
+            if ((*pos) > 0) {
+                str[--(*pos)] = '\0';
+            }
             break;
         default:
             if (isprint(c) && *pos < len-1) {