fix get_image_archive and web archiveinfo handler for non-images

hub/kojihub.py

@@ -3789,6 +3789,8 @@ def get_image_archive(archive_id, strict=False):
     select = """SELECT %s FROM image_archives
     WHERE archive_id = %%(archive_id)i""" % ', '.join(fields)
     results = _singleRow(select, locals(), fields, strict=strict)
+    if not results:
+        return None
     results['rootid'] = False
     fields = ('image_id', 'rpm_id')
     select = """SELECT %s FROM image_listing

www/kojiweb/archiveinfo.chtml

@@ -137,7 +137,7 @@
         #end if
       </td>
     </tr>
-    #if $archive.rootid
+    #if 'rootid' in $archive and $archive.rootid
     <tr>
       <th colspan="2"><a href="rpmlist?imageID=$archive.id&amp;type=image" title="RPMs that where installed to the image">Installed RPMs</a></th>
     </tr>