more checks

[skip ci]

Author: fxlb

.appveyor.yml

@@ -69,4 +69,5 @@ build_script:
   - if DEFINED PLATFORM cmake -DPCAP_ROOT=c:\projects\libpcap\Win32\%SDK% -G"%GENERATOR%" -A %PLATFORM% ..
   - msbuild /m /nologo /p:Configuration=Debug tcpdump.sln
   - Debug\tcpdump.exe --version & echo .
+  - exit 0
   - rem msbuild /nologo /p:Configuration=Debug check.vcxproj