Fixes major bug in the translation system.

The bug caused the default language to be ignored if set to "English" 
regardless of whether this was done through the browser or through a
cookie.

svn path=/trunk/boinc/; revision=17012

html/inc/translation.inc

@@ -154,6 +154,9 @@ function tra($text /* ...arglist... */){
         if (isset($language_lookup_array[$language][$text])) {
             $text = $language_lookup_array[$language][$text];
             break;
+        } else if ($language=="en"){ 
+	    // This language is defined in the code and is always available
+	    break;
 	}
     }