[10075] Attempt use more expected by result buffs downranking algo.

[newsbot]

<pre>m src/game/Spell.cpp
m src/game/SpellAuras.cpp
m src/game/SpellHandler.cpp
m src/game/SpellMgr.cpp
m src/game/SpellMgr.h
m src/shared/revision_nr.h

[10075] Attempt use more expected by result buffs downranking algo.

* In small rate more fast
* Not affect non-buff ranked spells like 10909</pre>



Дальше... (http://github.com/mangos/mangos/commit/aa2b8a5270650de2f0124260396892dcba49b2d4)