The arguments passed on the command-line were not checked if they were files before being opened. This caused StyledEdit to crash if a directory was one of the arguments. Now each argument being passed is checked to see if it is a file before being opened, and if all arguments are directories, an empty document will be opened.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17235 a95241bf-73f2-0310-859d-f6bbb57e9c96