Windows installer: Avoid "close failed in file object destructor" error when UAC disabled
Windows installer: Avoid "close failed in file object destructor" error when UAC disabled

Update issue 1331
Status: Done
Fixed by avoiding printing when sys.stdout.fileno() == -2.

fiuba08/robotframework,waldenner/robotframework,waldenner/robotframework,fiuba08/robotframework,ldtri0209/robotframework,fiuba08/robotframework,ldtri0209/robotframework,waldenner/robotframework,ldtri0209/robotframework,ldtri0209/robotframework,fiuba08/robotframework,fiuba08/robotframework,ldtri0209/robotframework,waldenner/robotframework,waldenner/robotframework