Core/Battleground:
Add missing NULL pointer check for player if is not in world

Core/Spell:
Add absolute value for delta because can be nevgative

Close #10846
Core/Battleground:
Offline players will displayed on scoreboard
DB/SAI: Fix Aludane Whitecloud spawing adds
Merge pull request #10888 from zorix/PR4

Core/Battleground:
Misc: Fix warnings
Core/Battleground: Fix compile after last pull request.
Merge branch 'master' of github.com:TrinityCore/TrinityCore into 4.3.4
Merge pull request #2 from TrinityCore/4.3.4

4.3.4