[Piglit] random results with texture-integer-glsl130

[Vadim Girlin]

Hi,

texture-integer-glsl130 is randomly failing/passing for me with r600g.
AFAICS it usually fails due to alpha component mismatch while testing
the formats that don't have alpha. Here is the example:

texture-integer: failure with format GL_RG8I:
  texture color = 98, 98, 17, 0
  expected color = 0.25, 0.5, 0, 0
  result color = 0.25098, 0.501961, 0, 1
PIGLIT: {'result': 'fail' }

If I'm not missing something, then the result in fact is correct and
expected alpha should be 1 according to GL/EXT_texture_integer specs:

> Final Expansion to RGBA
> 
>     This step is performed only for non-depth component groups. Each
>     group is converted to a group of 4 elements as follows: if a group
>     does not contain an A element, then A is added and set to 1 for
>     integer components or 1.0 for floating-point components.

Probably there is also a problem in the r600g driver, because it should
never pass the test as far as I understand, but I'd like to find out
exactly what is the correct expected alpha value before trying to fix
the driver.

So I think the test should set expected alpha to 1 for the formats
without alpha component, is it right?

Vadim