Bug#567192: include patches from recent DSA

[Steffen Joeris]

Package: ircd-hybrid
Version: 1:7.2.2.dfsg.2-6.1
Severity: grave
Tags: security patch

Hi

DSA-1980-1 has fixed an issue in ircd-hybrid, patch attached. Please
include this patch in your next upload.

Cheers
Steffen

--- ircd-hybrid-7.2.2.dfsg.2.orig/src/irc_string.c
+++ ircd-hybrid-7.2.2.dfsg.2/src/irc_string.c
@@ -103,7 +103,9 @@
     }
     else
       *d++ = *src;
-    ++src, --len;
+    if (len > 0) {
+       ++src, --len;
+    }
   }
   *d = '\0';
   return dest;