Don't link to new page diffs

diff --git a/includes/SpecialContributions.php b/includes/SpecialContributions.php
index 44df343..a307df1 100644 (file)
--- a/includes/SpecialContributions.php
+++ b/includes/SpecialContributions.php
@@ -147,7 +147,8 @@ class ContribsPager extends ReverseChronologicalPager {
                        }
 
                }
-               if( $rev->userCan( Revision::DELETED_TEXT ) ) {
+               # Is there a visable previous revision?
+               if( $rev->userCan(Revision::DELETED_TEXT) && $rev->getParentId() !== 0 ) {
                        $difftext = '(' . $sk->makeKnownLinkObj( $page, $this->messages['diff'], 'diff=prev&oldid='.$row->rev_id ) . ')';
                } else {
                        $difftext = '(' . $this->messages['diff'] . ')';