From 7482f259cf0cdf64bf173f2c83d4d14b108fa066 Mon Sep 17 00:00:00 2001
From: Pascal de Bruijn <pmjdebruijn@pcode.nl>
Date: Thu, 27 Mar 2014 18:20:21 +0100
Subject: [PATCH] main: guard against rnd(0) in rndmapname

starting ac_client from the wrong working directory, where
packages/maps/official/*.cgz globs to an empty list, we
trigger a SIGFPE because of rnd(0):

Program received signal SIGFPE, Arithmetic exception.
0x000000000044d37d in rndmapname () at main.cpp:897
897	        char *map = newstring(maps[rnd(maps.length())]);
---
 source/src/main.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/source/src/main.cpp b/source/src/main.cpp
index 1f486964..448b6c35 100644
--- a/source/src/main.cpp
+++ b/source/src/main.cpp
@@ -895,9 +895,13 @@ const char *rndmapname()
 {
     vector<char *> maps;
     listfiles("packages/maps/official", "cgz", maps);
-    char *map = newstring(maps[rnd(maps.length())]);
-    maps.deletearrays();
-    return map;
+    if (maps.length() > 0)
+    {
+        char *map = newstring(maps[rnd(maps.length())]);
+        maps.deletearrays();
+        return map;
+    }
+    else return "";
 }
 
 extern void connectserv(char *, int *, char *);