remove return argument from wmOperatorType->cancel, was only ever returning OPERATOR_CANCELLED.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@61016 954f8c5b-7b00-dc11-b283-0030488c597c
quiet bullet include warning by treating bullet as a system include.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@61017 954f8c5b-7b00-dc11-b283-0030488c597c