Avoid Xdummy version detection, assume 0.4.1.

diff --git a/setup.py b/setup.py
index 529b591b1..b9431fea8 100755
--- a/setup.py
+++ b/setup.py
@@ -793,6 +793,7 @@ def vernum(s):
     return tuple(int(v) for v in s.split("-", 1)[0].split("."))

 def get_dummy_driver_version():
+    return "0.4.1"
     #try various rpm names:
     for rpm_name in ("xorg-x11-drv-dummy", "xf86-video-dummy"):
         r, out, err = get_status_output(["rpm", "-q", "--queryformat", "%{VERSION}", rpm_name])