st/nine: Handle RSQ special cases
st/nine: Handle RSQ special cases

We should use the absolute value of the input as input to ureg_RSQ.

Moreover, an input of 0.0 should return FLT_MAX.

Reviewed-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Axel Davy <axel.davy@ens.fr>

Cc: "10.4" <59f39c0db42d4479a46b02d4d2bc11120e37bb44@lists.freedesktop.org>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler