[buildrobot] Broken build in display_debug_frames()

[nick clifton]

Hi Jan-Benedict,
> On my i686-linux host, building binutils is broken since your recent
> commit, though the two amd64 hosts continue to build just fine:

Snafu - I checked building on a 64-bit host but not a 32-bit host.  Doh.

Now fixed...

Cheers
   Nick