Merged r4703 from trunk (scm: fix error on revision page for empty revision).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/1.1-stable@4707 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/repositories_controller.rb

@@ -139,6 +139,7 @@ class RepositoriesController < ApplicationController
   end
   
   def revision
+    raise ChangesetNotFound if @rev.nil? || @rev.empty?
     @changeset = @repository.find_changeset_by_name(@rev)
     raise ChangesetNotFound unless @changeset
 

app/models/repository.rb

@@ -94,6 +94,7 @@ class Repository < ActiveRecord::Base
   
   # Finds and returns a revision with a number or the beginning of a hash
   def find_changeset_by_name(name)
+    return nil if name.nil? || name.empty?
     changesets.find(:first, :conditions => (name.match(/^\d*$/) ? ["revision = ?", name.to_s] : ["revision LIKE ?", name + '%']))
   end