st/nine: Fix behaviour of D3DUSAGE_QUERY_POSTPIXELSHADER_BLENDING
st/nine: Fix behaviour of D3DUSAGE_QUERY_POSTPIXELSHADER_BLENDING

Ignore D3DUSAGE_QUERY_POSTPIXELSHADER_BLENDING when
D3DUSAGE_RENDERTARGET is not specified.

This behaviour matches windows drivers.

Reviewed-by: Axel Davy <2b6ef604b998fb81662f85c329e4fc020eae8e5d@ens.fr>
Signed-off-by: Xavier Bouchoux <e9cfce4fcf378facd135f8db23dca45dea57fb90@gmail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler