release-windows.yml: bailout on compiler warnings

Author: firewave

.github/workflows/release-windows.yml

@@ -94,6 +94,8 @@ jobs:
       # TODO: build with multiple threads
       - name: Build CLI x64 release configuration using MSBuild
         run: msbuild -m cppcheck.sln -t:cli -p:Configuration=Release-PCRE -p:Platform=x64 -p:HaveBoost=HAVE_BOOST -p:BoostInclude=%GITHUB_WORKSPACE%\boost || exit /b !errorlevel!
+        env:
+          _CL_: /WX
 
       - uses: actions/upload-artifact@v4
         with: