Merged r2137 from trunk.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/0.8-stable@2138 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/repositories_controller.rb

@@ -51,8 +51,9 @@ class RepositoriesController < ApplicationController
     @users += User.find_all_by_id(additional_user_ids) unless additional_user_ids.empty?
     @users.compact!
     @users.sort!
-    if request.post?
-      @repository.committer_ids = params[:committers]
+    if request.post? && params[:committers].is_a?(Hash)
+      # Build a hash with repository usernames as keys and corresponding user ids as values
+      @repository.committer_ids = params[:committers].values.inject({}) {|h, c| h[c.first] = c.last; h}
       flash[:notice] = l(:notice_successful_update)
       redirect_to :action => 'committers', :id => @project
     end