[patch+7.8?] Fix --with-babeltrace with gcc-4.9.1

[Jan Kratochvil]

On Tue, 12 Aug 2014 22:32:55 +0200, Doug Evans wrote:
> E.g., can we just delete "pos" and the function call that initializes it?
> 
> struct bt_iter_pos *pos = bt_iter_get_pos (bt_ctf_get_iter (NULL));

I think we cannot and the reason is given in the comment there:
  # Append -Werror to CFLAGS so that configure can catch the warning
  # "assignment from incompatible pointer type", which is related to
  # the babeltrace change from 1.0.3 to 1.1.0.  Babeltrace 1.1.0 works
  # in GDB, while babeltrace 1.0.3 is broken.


> Or, if for some reason we need to test whether bf_ctf_get_iter exists,
> can we just
> call it and discard the result?

Also not due to the reason above.


Jan