This commit is the only change between Xorg's libX11 1.6.6 and 1.6.7
that affects our code. So were are effectively now on par with libX11
1.6.7 (commit f3c978476e0be6813268af494efb7ac507451116)

  From: Bhavi Dhingra <b.dhingra@samsung.com>
  Date: Mon, 28 Sep 2015 08:33:40 +0000
  Subject: [PATCH] XcmsLookupColor: fully initialize XColor structs passed to
   _XColor_to_XcmsRGB

  Fixes https://gitlab.freedesktop.org/xorg/lib/libx11/issues/44
  aka https://bugs.freedesktop.org/show_bug.cgi?id=92154Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

We are at X.Org libX11 upstream commit 733f64b

Fixes: ArcticaProject/nx-libs #716, #719 and #720