[xorg-x11-server] Fix git-am to terminate sanely if there's no patches

[Adam Jackson]

commit a37d43797a3e9ee8df99b3a496effe6d1c459910
Author: Adam Jackson <ajax at redhat.com>
Date:   Wed Feb 22 13:17:53 2012 -0500

    Fix git-am to terminate sanely if there's no patches

 xorg-x11-server.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/xorg-x11-server.spec b/xorg-x11-server.spec
index fc3eead..b6f3d22 100644
--- a/xorg-x11-server.spec
+++ b/xorg-x11-server.spec
@@ -321,7 +321,7 @@ git commit -a -q -m "%{version} baseline."
 %endif
 
 # Apply all the patches.
-git am -p1 %{patches}
+git am -p1 %{patches} < /dev/null
 
 %if %{with_hw_servers} && !0%{?gitdate}
 # check the ABI in the source against what we expect.