Windows CI: another one

appveyor.yml

@@ -19,7 +19,6 @@ configuration: Release
 build:
 
 build_script:
-- cd c:\projects
-- cd assimp
+- cd c:\projects\assimp
 - cmake -G"Visual Studio 11" ..
 - msbuild /m /p:Configuration=Release /p:Platform="Win32" Assimp.sln