Buildsystem/MSVC: Warning fixes

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

src/server/scripts/Commands/cs_misc.cpp

@@ -1341,7 +1341,7 @@ public:
             return false;
         }
 
-        bool targetHasSkill = target->GetSkillValue(skill);
+        bool targetHasSkill = target->GetSkillValue(skill) != 0;
 
         // If our target does not yet have the skill they are trying to add to them, the chosen level also becomes
         // the max level of the new profession.