Comment 5 for bug 2016064

I don't know why debug symbols aren't working but it looks like the stage pointer is bogus in clutter_stage_get_device_coords:

0x00007fc0139182d8 <+24>: mov 0x28(%rdi),%r14 <-- crash
0x00007fc0139182dc <+28>: call 0x7fc0139179d0 <clutter_stage_get_type>