st/nine: Always set point_quad_rasterization to 1
st/nine: Always set point_quad_rasterization to 1

Both Points and Point Sprites are rasterized like quads,
according to d3d9 doc and gallium rasterizer doc.

Signed-off-by: Axel Davy <2b6ef604b998fb81662f85c329e4fc020eae8e5d@ens.fr>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler