Buildsystem/MSVC: Warning fixes

C4800 'type' : forcing value to bool 'true' or 'false' (performance warning)
C4127 conditional expression is constant

src/server/scripts/Spells/spell_hunter.cpp

@@ -486,7 +486,7 @@ class spell_hun_misdirection : public SpellScriptLoader
 
             bool CheckProc(ProcEventInfo& /*eventInfo*/)
             {
-                return GetTarget()->GetRedirectThreatTarget();
+                return GetTarget()->GetRedirectThreatTarget() != nullptr;
             }
 
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& /*eventInfo*/)