[11698][Patch] Spells 50756 and 50758 spell icon stack check

[Xfurry]

Description of the feature?

Allow a creature to cast spells 50756 and 50758 without removing each other due to the same icon id

For which repository revision was the patch created?

11690

Is there a thread in the bug report section or at lighthouse?

no

Who has been writing this patch?

me

http://paste2.org/p/1492443

[VladimirMangos]

Not sure that safe use spellicon check, too many spells. Added as direct spell ids checks in [11698]