Track Adrai Brain Chat with qvar2 instead

Reverts the new QS_ and swaps to using qvar2 and TEXT_MUSH11 to track if Adria has given the quest text regarding the brain to match what Deviltuion/1.09 does to keep save file compatibility.

Source/quests.h

@@ -30,7 +30,6 @@ enum {
 	QS_MUSHPICKED,
 	QS_MUSHGIVEN,
 	QS_BRAINSPAWNED,
-	QS_ADRIATALKED,
 	QS_BRAINGIVEN,
 };
 

Source/towners.cpp

@@ -367,9 +367,9 @@ void TalkToWitch(Player &player, Towner & /*witch*/)
 				}
 			}
 			if (Quests[Q_MUSHROOM]._qvar1 >= QS_MUSHGIVEN) {
-				if (HasInventoryItemWithId(player, IDI_BRAIN) && Quests[Q_MUSHROOM]._qvar1 != QS_ADRIATALKED) {
+				if (HasInventoryItemWithId(player, IDI_BRAIN) && Quests[Q_MUSHROOM]._qvar2 != TEXT_MUSH11) {
 					Quests[Q_MUSHROOM]._qmsg = TEXT_MUSH11;
-					Quests[Q_MUSHROOM]._qvar1 = QS_ADRIATALKED;
+					Quests[Q_MUSHROOM]._qvar2 = TEXT_MUSH11;
 					NetSendCmdQuest(true, Quests[Q_MUSHROOM]);
 					InitQTextMsg(TEXT_MUSH11);
 					return;