More fixes while completing sanity check for enums

Typepunning failed, didn't know about the difference between C/C++ with strict aliasing in this specific case...

gencpp.vcxproj.filters

@@ -50,6 +50,9 @@
     <ClInclude Include="thirdparty\zpl.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="test\NonParsed\Sanity.hpp">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include=".editorconfig" />