Core/Misc: Port some cherry-pick refactors

Author: Shauren

src/server/game/Achievements/AchievementMgr.cpp

@@ -379,7 +379,7 @@ bool AchievementCriteriaData::Meets(uint32 criteria_id, Player const* source, Wo
             Unit const* unitTarget = target->ToUnit();
             if (!unitTarget)
                 return false;
-            return unitTarget->GetGender() == Gender(gender.gender);
+            return unitTarget->GetGender() == static_cast<::Gender>(gender.gender);
         }
         case ACHIEVEMENT_CRITERIA_DATA_TYPE_SCRIPT:
         {

src/server/game/Groups/Group.cpp

@@ -63,7 +63,7 @@ Group::Group() : m_leaderGuid(), m_leaderName(""), m_groupType(GROUPTYPE_NORMAL)
 m_dungeonDifficulty(DUNGEON_DIFFICULTY_NORMAL), m_raidDifficulty(RAID_DIFFICULTY_10MAN_NORMAL),
 m_bgGroup(nullptr), m_bfGroup(nullptr), m_lootMethod(FREE_FOR_ALL), m_lootThreshold(ITEM_QUALITY_UNCOMMON), m_looterGuid(),
 m_masterLooterGuid(), m_subGroupsCounts(nullptr), m_guid(), m_counter(0), m_maxEnchantingLevel(0), m_dbStoreId(0), m_isLeaderOffline(false),
- m_scriptRef(this, NoopGroupDeleter())
+m_scriptRef(this, NoopGroupDeleter())
 {
     for (uint8 i = 0; i < TARGET_ICONS_COUNT; ++i)
         m_targetIcons[i].Clear();

src/server/game/Server/WorldSocket.cpp

@@ -95,7 +95,7 @@ bool WorldSocket::Update()
                 if (!queued->empty())
                     buffer.Write(queued->contents(), queued->size());
             }
-            else    // single packet larger than buffer size
+            else    // single packet larger than _sendBufferSize
             {
                 MessageBuffer packetBuffer(queued->size() + header.getHeaderLength());
                 packetBuffer.Write(header.header, header.getHeaderLength());