Fix for error in r61159: the new gpencil_new_layer_col in UserDef is supposed to be a 4 float RGBA color, but has only 3 floats. This was overwriting tweak_threshold in UserDef and breaking transform
operators ...

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@61177 954f8c5b-7b00-dc11-b283-0030488c597c