Fix some leaks of groups/raids (#1242)

These cases probably are exceedingly rare, but they still need to be
accounted for. (As in, I don't think anyone has run into these cases too
often to cause problems)

zone/bot.cpp

@@ -8605,6 +8605,8 @@ void Bot::ProcessBotGroupInvite(Client* c, std::string botName) {
 					g->SaveGroupLeaderAA();
 					database.SetGroupID(c->GetName(), g->GetID(), c->CharacterID());
 					database.SetGroupID(invitedBot->GetCleanName(), g->GetID(), invitedBot->GetBotID());
+				} else {
+					delete g;
 				}
 			} else {
 				AddBotToGroup(invitedBot, c->GetGroup());

zone/client_packet.cpp

@@ -561,8 +561,9 @@ void Client::CompleteConnect()
 				entity_list.AddRaid(raid, raidid);
 				raid->LoadLeadership(); // Recreating raid in new zone, get leadership from DB
 			}
-			else
-				raid = nullptr;
+			else {
+				safe_delete(raid);
+			}
 		}
 		if (raid) {
 			SetRaidGrouped(true);

zone/worldserver.cpp

@@ -1016,7 +1016,7 @@ void WorldServer::HandleMessage(uint16 opcode, const EQ::Net::Packet &p)
 				if (group->GetID() != 0)
 					entity_list.AddGroup(group, groupid);
 				else
-					group = nullptr;
+					safe_delete(group);
 			}
 
 			if (group)