Fix again memory leaks in CreatureGroupManager::LoadCreatureFormations()

my log:

==28921== 112 bytes in 7 blocks are definitely lost in loss record 8 of 67
==28921==    at 0x4C2626C: operator new(unsigned long) (vg_replace_malloc.c:230)
==28921==    by 0x8A6043: CreatureGroupManager::LoadCreatureFormations() (CreatureGroups.cpp:111)
==28921==    by 0xC00E91: World::SetInitialWorldSettings() (World.cpp:1553)
==28921==    by 0x808D56: Master::Run() (Master.cpp:235)
==28921==    by 0x808215: main (Main.cpp:154)

--HG--
branch : trunk

src/game/CreatureGroups.cpp

@@ -130,6 +130,7 @@ void CreatureGroupManager::LoadCreatureFormations()
             if(!result)
             {
                 sLog.outErrorDb("creature_formations table leader guid %u incorrect (not exist)", group_member->leaderGUID);
+                delete group_member;
                 continue;
             }
             delete result;
@@ -138,6 +139,7 @@ void CreatureGroupManager::LoadCreatureFormations()
             if(!result)
             {
                 sLog.outErrorDb("creature_formations table member guid %u incorrect (not exist)", memberGUID);
+                delete group_member;
                 continue;
             }
             delete result;