[8475] fixed some gcc-warnings

all warnings from Wunused
and some from Wall

cause unused may be most interesting for some:
they were in following files:
src/game/Level2.cpp
src/game/Map.cpp
src/game/SpellAuras.cpp
src/game/Unit.cpp
src/mangosd/Master.cpp
but i guess mostly someone just fogot to remove this code

for some unsigned vs signed warnings i used:
ack "for.*int .*size\(\)" | ack -v uint

also note for coding:
if you do something like
    if( a && b || c)
just place parentheses around (a && b) && always will have
precedence over || but without parentheses this could be overseen
quite fast (at least that's my guess why gcc will warn for this)

Signed-off-by: balrok <der-coole-carl@gmx.net>

src/game/Unit.cpp

@@ -6500,7 +6500,6 @@ bool Unit::HandleProcTriggerSpell(Unit *pVictim, uint32 damage, Aura* triggeredB
                     {
                         if ((*i)->GetModifier()->m_miscvalue == SPELLMOD_CHANCE_OF_SUCCESS && (*i)->GetSpellProto()->SpellIconID == 113)
                         {
-                            int32 value2 = CalculateSpellDamage((*i)->GetSpellProto(),2,(*i)->GetSpellProto()->EffectBasePoints[2],this);
                             // Drain Soul
                             CastCustomSpell(this, 18371, &basepoints[0], NULL, NULL, true, castItem, triggeredByAura);
                             break;