fixed Blender crash, but unclear when this situation can happen

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57871 954f8c5b-7b00-dc11-b283-0030488c597c
fixed a compiler warning message in vs 2008

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57872 954f8c5b-7b00-dc11-b283-0030488c597c
re-arrange '--help' output into more useful sections (added debug, python).
also minor style cleanup


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57873 954f8c5b-7b00-dc11-b283-0030488c597c
Fix scons/windows build error, missing pthreads include in blenfont for mutex.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57874 954f8c5b-7b00-dc11-b283-0030488c597c
Fix swapped descriptions for window X/Y position properties.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57875 954f8c5b-7b00-dc11-b283-0030488c597c
Fix more swapped descriptions for mouse X/Y position properties.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57876 954f8c5b-7b00-dc11-b283-0030488c597c