[libgfortran, patch] Silence a warning in fallback round() implementation

[Tobias Burnus]

On 11/08/2011 10:06 AM, FX wrote:
> PR 47970 is about a warning in libgfortran/intrinsics/c99_functions.c for platforms without round() and ceill(), because round() is used in roundl() before it's prototype is given. Moving the round() prototype and implementation earlier in the file fixes it.
>
> Patch tested by manually editing my config.h on x86_64-linux to simulate the conditions. OK to commit to trunk?

OK and rather obvious.

Thanks for the patch and for going though the PRs.

Tobias