[openstack-tripleo-image-elements] Add check for manifest_file in %post

[slagle]

commit c5d1f70d49a915a0cf886a417e7ec1332e463ed5
Author: James Slagle <jslagle at redhat.com>
Date:   Fri Oct 24 08:11:59 2014 -0400

    Add check for manifest_file in %post

 openstack-tripleo-image-elements.spec |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/openstack-tripleo-image-elements.spec b/openstack-tripleo-image-elements.spec
index aac5339..377f096 100644
--- a/openstack-tripleo-image-elements.spec
+++ b/openstack-tripleo-image-elements.spec
@@ -59,6 +59,9 @@ chmod +x %{buildroot}/%{_datadir}/tripleo-image-elements/tuskar/install.d/tuskar
 
 %post
 manifest_file=/etc/dib-manifests/dib-element-manifest
+if [ ! -f $manifest_file ]; then
+    exit 0
+fi
 source /usr/share/diskimage-builder/lib/common-functions
 TMP_HOOKS_PATH=$(mktemp -d)
 IMAGE_ELEMENT=$(cat $manifest_file)