updated to wait

Author: smasherprog

.appveyor.yml

@@ -17,7 +17,7 @@ platform:
 
 install:  
   - ps: wget https://download.microsoft.com/download/7/9/6/796EF2E4-801B-4FC4-AB28-B59FBF6D907B/VCForPython27.msi
-  - msiexec /i c:\projects\proj\VCForPython27.msi /quiet /qn /norestart
+  - start /wait msiexec /i c:\projects\proj\VCForPython27.msi /quiet /qn /norestart
   - pip install autobahntestsuite
   - ps: If ($env:Platform -Match "x86"){ $env:CMAKE_ARCH="" } Else { $env:CMAKE_ARCH=" Win64"}
   - cd c:\projects