egl: Fix predecence problem when setting __DRI_CTX_FLAG_NO_ERROR

This accidentally set __DRI_CTX_FLAG_NO_ERROR whenever any flags were
present.  Just needs extra parenthesis.

Fixes: 4909519a6655 (egl: Add EGL_KHR_create_context_no_error support)

Reviewed-by: Grigori Goronzy <greg@chown.ath.cx>
Tested-by: Mark Janes <mark.a.janes@intel.com>
1 file changed