Core/Master: Use ASSERT to halt server in freeze detector

src/server/worldserver/Master.cpp

@@ -102,7 +102,7 @@ public:
             else if (getMSTimeDiff(w_lastchange,curtime) > _delaytime)
             {
                 sLog->outError("World Thread hangs, kicking out server!");
-                *((uint32 volatile*)NULL) = 0;                       // bang crash
+                ASSERT(false);
             }
         }
         sLog->outString("Anti-freeze thread exiting without problems.");