do not crash on rdiff with 3 arguments (#571483)

osc/commandline.py

@@ -1857,7 +1857,7 @@ Please submit there instead, or use --nodevelproject to force direct submission.
             if opts.oldprj or opts.oldpkg:
                 raise oscerr.WrongArgs('--oldpkg and --oldprj are only valid with two arguments')
             old_project = args[0]
-            old_package = args[1]
+            new_package = old_package = args[1]
             new_project = args[2]
             if len(args) == 4:
                 new_package = args[3]

osc/core.py

@@ -3465,7 +3465,7 @@ def get_results(apiurl, prj, package, lastbuild=None, repository=[], arch=[]):
             rmap['status'] += ': ' + statusnode.find('details').text
 
         if rmap['dirty'] == 'true':
-            rmap['status'] = 'outdated (was: %s)' % rmap['status']
+            rmap['status'] = 'state is outdated (was: %s)' % rmap['status']
 
         r.append(result_line_templ % rmap)
     return r