Bug fix #3033

Using "make parent armature with creating vertex groups" option gave
corrupted memory when one or more bones had the "Deform" option not set.
Was caused by old boneclass SKINNABLE variable. To end this confusement,
removed this define from code.

Note for future Armature tool coders; don't use this bonelooper
functionality. Operations in Object mode for armatures should use the
Pose Channels, which is a simple ListBase to go over. I have to recode
the 'create vertexgroups' still...

source/blender/python/api2_2x/Bone.c

@@ -619,7 +619,6 @@ static PyObject *M_Bone_New( PyObject * self, PyObject * args )
 	BLI_strncpy( py_bone->parent, parent_str, strlen( parent_str ) + 1 );
 	py_bone->roll = 0.0f;
 	py_bone->flag = 32;
-	py_bone->boneclass = BONE_SKINNABLE;
 	py_bone->dist = 1.0f;
 	py_bone->weight = 1.0f;
 	Vector_Zero( py_bone->head );