What steps will reproduce the problem? 1. mu index

What is the expected output? What do you see instead? scanning ~/Maildir instead: mu: Please provide a valid Maildir

What version of the product are you using? On what operating system? 0.6-beta

Please provide any additional information below. patch attached, one check is inverted bug and patch originally at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=566183

oh, that was a silly mistake, fixed in git. thanks for the report, patch.