Affected were (at least)
- Select Linked pick
- Select Shortest Path
Was originally caused by rB8b347fc2cdc6 [which got improved in
rBfc8a7a44b200 - but only partially].
After removal of BONESEL_NOSEL we have to filter out -1 from the hits for
any bone picking it seems (since armature drawing uses this).
In rBfc8a7a44b200, this was done for 'ED_armature_edit_select_pick' (or
'get_nearest_editbonepoint' precisely), now do this for
'ed_armature_pick_bone_impl' as well.