Fix minor mistakes in previous commit

(cherry picked from AC commit 515e8c988cdf0ed5b9d46d41214afebb2de48b76)

Author: trickerer

src/server/game/AI/NpcBots/bot_ai.cpp

@@ -19029,8 +19029,12 @@ void bot_ai::Evade()
                         float dist = frand (0.f, nextNode->GetProximity() * 2.f);
                         x = x + dist * std::cos(angle);
                         y = y + dist * std::sin(angle);
-                        if (me->GetMap()) 
-                            z = me->GetMap()->GetHeight(me->GetPhaseMask(), x, y, z + 2);
+                        float ground = z;
+                        me->UpdateGroundPositionZ(x, y, ground);
+                        if (ground > INVALID_HEIGHT)
+                            z = ground;
+                        else
+                            z += 2.f;
                     }
                     homepos.Relocate(x, y, z, o);
                     if (me->GetMap()->GetEntry()->IsContinent())

src/server/game/AI/NpcBots/botdatamgr.cpp

@@ -1422,7 +1422,7 @@ void BotDataMgr::LoadWanderMap(bool reload, bool force_all_maps)
         wp->SetFlags(BotWPFlags(flags));
         wp->SetWaitTime(minwaittime, maxwaittime);
         wp->SetProximity(proximity);
-        
+
         if (wp->HasFlag(BotWPFlags::BOTWP_FLAG_SPAWN) && !lstr.empty())
             all_spawn_nodes.push_back(wp);