Several crash fixes

src/PlayerbotAI.cpp

@@ -250,7 +250,7 @@ void PlayerbotAI::UpdateAI(uint32 elapsed, bool minimal)
     UpdateAIInternal(elapsed, min);
 
     // test fix lags because of BG
-    if (!bot->IsInCombat())
+    if (bot && !bot->IsInCombat())
         min = true;
 
     YieldThread(min);

src/TravelMgr.cpp

@@ -3955,6 +3955,10 @@ std::vector<WorldPosition> TravelMgr::getNextPoint(WorldPosition center, std::ve
                 rnd -= weights[i];
     }
 
+    // Peiru: Crash failsafe - if the retVec is still empty but points exist, return first point
+    if (retVec.empty() && points.size() > 0)
+        retVec.push_back(points[0]);
+
     if (!retVec.empty())
         return retVec;