modify snapObjectsRayEx() to use a pointer to 'ray_dist' rather then passing the dist, this is to better support multiple calls to ray-cast where only closer distances are accepted. 


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56034 954f8c5b-7b00-dc11-b283-0030488c597c