[webui] if the user can't be found in commit history, then don't put …

…up invalid links

src/webui/app/views/package/_commit_item.html.erb

@@ -3,13 +3,17 @@
   <% if commit[:user] == "_service" %>
     <%= image_tag('icons/cog.png') %> automatic update by service
   <% else %>
-    <% user = commit[:user] || '-' %>
-    <% realname = Person.realname_for_login(user) %>
-    <%= user_icon(user) %>
-    <% if not realname.empty? %>
-      <%= link_to(realname + " (" + user + ")", :controller => :home, :user => user) %>
+    <% user = Person.find_hashed(commit[:user]) %>
+    <% if user["login"] %>
+      <% realname = user["realname"] %>
+      <%= user_icon(user["login"]) %>
+      <% if not realname.empty? %>
+        <%= link_to(realname + " (" + user["login"] + ")", :controller => :home, :user => user["login"]) %>
+      <% else %>
+        <%= link_to(user["login"], :controller => :home, :user => user["login"]) %>
+      <% end %>
     <% else %>
-      <%= link_to(user, :controller => :home, :user => user) %>
+       -
     <% end %>
     <% if commit[:requestid] %>
       accepted <%= link_to("request #{commit[:requestid]}", {:controller => :request, :action => :show, :id => commit[:requestid]}) %>