[CMake] CPack error : Problem checking NSIS version with command: "C:/NSIS/makensis.exe" /VERSION

[Iosif Neitzke]

When trying to run CPack with NSIS 2.15, i get:

CPack error : Problem checking NSIS version with command:
"C:/NSIS/makensis.exe" /VERSION

Please check ./NSISOutput.log for errors

CPack error : Cannot initialize the generator NSIS

NSISOutput.log:
# Run command: "C:/NSIS/makensis.exe" /VERSION
# Output:
2.15

This happens with CMake 2.8.11 and 2.8.12.