st/va: fix incorrect argument in vl_compositor_cleanup
st/va: fix incorrect argument in vl_compositor_cleanup

This fixes the mistake introduced in commit
b6737a8bcd03ea68952799144c0c6e6e6679bee9

Signed-off-by: Nayan Deshmukh <df308fb4a67a5efb3258393111da6e14db0cf127@gmail.com>
Reviewed-by: Christian König <c7ea837d7a46effe4232b086213468b8b31643bf@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler