[Patch, Fortran, 4.6] F2008 - first coarray patch

[Tobias Burnus]

Hi all,

Tobias Burnus wrote:
> The attached patch implements CRITICAL block, ALL STOP, SYNC
> ALL/MEMORY/IMAGES, and num_images.
>   
I forgot a check for "C1288 A pure subprogram shall not contain an image
control statement.", which I now added in match.c's sync_statement and
match_critical (and in the coarray_3.f90 test case). Otherwise, the
patch is unchanged.

OK for the 4.6 trunk?

Tobias
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