clang-cl loplugin: helpcompiler

Change-Id: I72050a984389b2685dc7d78d4d52bec4ce453b53
Reviewed-on: https://gerrit.libreoffice.org/29864Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Stephan Bergmann <sbergman@redhat.com>

helpcompiler/inc/HelpCompiler.hxx

@@ -93,7 +93,7 @@ namespace fs
         {
             OUString ustrSystemPath;
             osl::File::getSystemPathFromFileURL(data, ustrSystemPath);
-            return (wchar_t const *) ustrSystemPath.getStr();
+            return ustrSystemPath.getStr();
         }
 #endif
         std::string toUTF8() const