Do not fail if screen(1) is not installed
Do not fail if screen(1) is not installed

If screen is not present then an error message is displayed each time
the prompt is displayed:
-bash: screen : command not found

The error message is now sent to /dev/null

milouse/liquidprompt,pkkolos/liquidprompt,joshuarubin/dotfiles,joshuarubin/dotfiles,joshuarubin/dotfiles,alexprengere/liquidprompt,mathieumd/liquidprompt,nojhan/liquidprompt,dtschan/liquidprompt,tocomo/liquidprompt,tkuminecz/liquidprompt,smadhueagle/liquidprompt,lyoshenka/liquidprompt,jonathanjsimon/liquidprompt,tsbarnes/liquidprompt,elementalvoid/liquidprompt,joshuarubin/dotfiles,dpilone/liquidprompt,illwieckz/liquidprompt,enrdstrm/liquidprompt,tstone2077/liquidprompt,jaesivsm/liquidprompt,colinlieberman/liquidprompt,timhyson/liquidprompt,dan-cleinmark/liquidprompt,BobHood/liquidprompt,kenrachynski/liquidprompt,laurentbardin/liquidprompt