Bug 90334: Do not display the "change several bugs at once" form if there are no…

buglist.cgi

@@ -1143,7 +1143,7 @@ $vars->{'quip'} = GetQuip();
 $vars->{'currenttime'} = time();
 
 # The following variables are used when the user is making changes to multiple bugs.
-if ($dotweak) {
+if ($dotweak && scalar @bugs) {
     $vars->{'dotweak'} = 1;
     $vars->{'valid_keywords'} = [map($_->name, Bugzilla::Keyword->get_all)];
     $vars->{'use_keywords'} = 1 if Bugzilla::Keyword::keyword_count();