code cleanup: use bool for shift arg, order args more consistently between functions.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@60933 954f8c5b-7b00-dc11-b283-0030488c597c
correct typo


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@60934 954f8c5b-7b00-dc11-b283-0030488c597c