Core/Misc: Fix some -Wconversion warnings

src/server/scripts/Spells/spell_item.cpp

@@ -2456,7 +2456,7 @@ class spell_item_unusual_compass : public SpellScriptLoader
             void HandleDummy(SpellEffIndex /* effIndex */)
             {
                 Unit* caster = GetCaster();
-                caster->SetFacingTo(frand(0.0f, 2.0f * M_PI));
+                caster->SetFacingTo(frand(0.0f, 2.0f * float(M_PI)));
             }
 
             void Register() override