[Piglit] [PATCH] ext_framebuffer_multisample: Fix dual source blending tests

[Eric Anholt]

Anuj Phogat <anuj.phogat at gmail.com> writes:

> alpha-to-coverage-dual-src-blend tests were broken after
> commit 44456ba. This patch fixes the tests by allowing
> frag_out_1 for dual-src-blend tests even with
> NUM_ATTACHMENTS == 1. In case of dual source blending both
> frag_out_0 and frag_out_1 go to color buffer 0 with color
> index 0 and 1 respectively.
> See glBindFragDataLocationIndexed() for details.

Sorry about that!

Reviewed-by: Eric Anholt <eric at anholt.net>
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