Warning fixes and some minor changes here and there

- Added GetAchievementPoints to AchievementMgr

src/server/scripts/EasternKingdoms/ZulGurub/boss_mandokir.cpp

@@ -46,7 +46,7 @@ class boss_mandokir : public CreatureScript
             {
             }
 
-            void KilledUnit(Unit* victim)
+            void KilledUnit(Unit* /*victim*/)
             {
             }
 

src/server/scripts/Spells/spell_warrior.cpp

@@ -222,7 +222,7 @@ class spell_warr_execute : public SpellScriptLoader
             void HandleEffect(SpellEffIndex /*effIndex*/)
             {
                 Unit* caster = GetCaster();
-                if (Unit* target = GetHitUnit())
+                if (GetHitUnit())
                 {
                     SpellInfo const* spellInfo = GetSpellInfo();
                     int32 rageUsed = std::min<int32>(200 - spellInfo->CalcPowerCost(caster, SpellSchoolMask(spellInfo->SchoolMask)), caster->GetPower(POWER_RAGE));