Fix crash when exception is thrown in startNewGame()

apps/openmw/mwmechanics/actors.cpp

@@ -926,7 +926,7 @@ namespace MWMechanics
         PtrActorMap::iterator iter = mActors.begin();
         while(iter != mActors.end())
         {
-            if(iter->first.getCell()==cellStore && iter->first != ignore)
+            if((iter->first.isInCell() && iter->first.getCell()==cellStore) && iter->first != ignore)
             {
                 delete iter->second;
                 mActors.erase(iter++);

apps/openmw/mwrender/ripplesimulation.cpp

@@ -185,7 +185,7 @@ void RippleSimulation::removeCell(const MWWorld::CellStore *store)
 {
     for (std::vector<Emitter>::iterator it = mEmitters.begin(); it != mEmitters.end();)
     {
-        if (it->mPtr.getCell() == store && it->mPtr != MWMechanics::getPlayer())
+        if ((it->mPtr.isInCell() && it->mPtr.getCell() == store) && it->mPtr != MWMechanics::getPlayer())
         {
             it = mEmitters.erase(it);
         }