log error if DISPELL was resisted

lib/spells/BattleSpellMechanics.cpp

@@ -142,6 +142,7 @@ void DispellMechanics::applyBattle(BattleInfo * battle, const BattleSpellCast *
 	for(auto stackID : packet->affectedCres)
 	{
 		if(vstd::contains(packet->resisted, stackID))
+			logGlobal->errorStream() << "Resistance to DISPELL";			
 			continue;
 
 		CStack *s = battle->getStack(stackID);