Core/Misc: fix static analysis issues

CID 1373466
CID 1373481
CID 1373482

(cherry picked from commit e478434146fd479fab955aaa80eb925c15e29809)

src/server/game/Entities/Unit/Unit.cpp

@@ -1683,7 +1683,7 @@ uint32 Unit::CalcSpellResistedDamage(Unit* victim, uint32 damage, SpellSchoolMas
     while (r >= probabilitySum && resistance < 10)
         probabilitySum += discreteResistProbability[++resistance];
 
-    float damageResisted = float(damage * resistance / 10);
+    float damageResisted = damage * resistance / 10.f;
     if (damageResisted > 0.0f) // if any damage was resisted
     {
         int32 ignoredResistance = GetTotalAuraModifierByMiscMask(SPELL_AURA_MOD_IGNORE_TARGET_RESIST, schoolMask);