Bugfixes

* Groups can now be abandoned using the "leave group" button.
* Non-group passive powers no longer buff the group leader instead of buffing the summoner.
* Adjusted various warning causing code pieces.
* Adjusted potions and battery prices.

src/GroupManager.cpp

@@ -147,9 +147,6 @@ void GroupManager::joinGroup(CNSocket* sock, CNPacketData* data) {
 }
 
 void GroupManager::leaveGroup(CNSocket* sock, CNPacketData* data) {
-    if (data->size != sizeof(P_CL2FE_REQ_PC_GROUP_LEAVE))
-        return; // malformed packet
-
     Player* plr = PlayerManager::getPlayer(sock);
 
     if (plr == nullptr)