Merge branch 'develop' of https://github.com/vcmi/vcmi into develop

AI/VCAI/VCAI.cpp

@@ -1652,6 +1652,11 @@ bool VCAI::moveHeroToTile(int3 dst, HeroPtr h)
 		assert(cb->getVisitableObjs(dst).size() > 1); //there's no point in revisiting tile where there is no visitable object
 		cb->moveHero(*h, CGHeroInstance::convertPosition(dst, true));
 		waitTillFree(); //movement may cause battle or blocking dialog
+		if(!h) // TODO is it feasible to hero get killed there if game work properly?
+		{ // not sure if AI can currently reconsider to attack bank while staying on it. Check issue 2084 on mantis for more information.
+			lostHero(h);
+			throw std::runtime_error("Hero was lost!");
+		}
 		ret = true;
 	}
 	else