If mesh doesn't start then exit

src/freedombone-mesh

 
 if [ ! -f /tmp/meshtype ]; then
     sudo batman start
+    if [ ! "$?" = "0" ]; then
+        exit 2
+    fi
     clear
 fi
 
 
 if [ ! $AVAHI_DOMAIN ]; then
     echo 'No domain name'
-    exit 2
+    exit 3
 fi
 
 # Connect to IRC
     if [ ! -f /usr/local/bin/irssi ]; then
         echo 'You need irssi installed on your system'
         sudo batman stop
-        exit 3
+        exit 4
     fi
 fi
 irssi -c $AVAHI_DOMAIN -p $IRC_PORT -n $USER