.github: vcvarsall.bat

.github/workflows/main.yml

@@ -39,6 +39,9 @@ jobs:
             git clone https://github.com/dbartolini/crown
         - name: windows-make-debug64
           run: |
+            cd "C:\Program Files(x86)\Microsoft Visual Studio 14.0\VC\"
+            .\vcvarsall.bat
+            cd "D:\a\crown\crown"
             cd "3rdparty\luajit\src"
             .\msvcbuild.bat
             # New-Item -path "build\win64\bin" -type directory