Change channel transition patch

Solved an issue where players were being unable to return to the game once changing channels.

src/net/server/channel/handlers/EnterMTSHandler.java

@@ -91,6 +91,7 @@ public final class EnterMTSHandler extends AbstractMaplePacketHandler {
             chr.unregisterChairBuff();
             Server.getInstance().getPlayerBuffStorage().addBuffsToStorage(chr.getId(), chr.getAllBuffs());
             Server.getInstance().getPlayerBuffStorage().addDiseasesToStorage(chr.getId(), chr.getAllDiseases());
+            chr.setSessionTransitionState();
             chr.setAwayFromChannelWorld();
             chr.notifyMapTransferToPartner(-1);
             chr.removeIncomingInvites();