39bf7756b9
We'll fail to flag an error if the context flags appear after the
no-error attribute in the context attribute list.
Delay the check to after attribute parsing to fix this.
Fixes: 4909519a66 ("egl: Add EGL_KHR_create_context_no_error support")
Cc: mesa-stable@lists.freedesktop.org
[Emil Velikov: add fixes/stable tags, commit message polish]
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>