reduce allowed ccp check warnings

CI/ci-cppcheck.sh

@@ -30,7 +30,7 @@ echo "CPPCHECK Summary"
 echo "=============================================================================="
 echo -e "${NC}"
 
-MAX_COUNT=100
+MAX_COUNT=27
 
 if [ $COUNT -gt $MAX_COUNT ]; then
   echo -e ${WARNING}

src/OpenMesh/Core/Utils/PropertyContainer.hh

@@ -357,7 +357,7 @@ private:
   struct Delete
   {
     Delete() {}
-    void operator()(BaseProperty* _p) const { if (_p) delete _p; _p=NULL; }
+    void operator()(BaseProperty* _p) const { if (_p) delete _p; }
   };
 #endif