--- uno	2010-01-05 18:14:26.000000000 +0100
+++ dos	2010-01-05 18:14:36.000000000 +0100
@@ -45,7 +45,7 @@ function gallery_assist_4cviewer_install
  */
 function gallery_assist_4cviewer_uninstall() {
   // Delete the Cooliris columns.
-  $sql = "ALTER TABLE {gallery_assist} DROP `cooliris`, DROP `cooliris_conf`";
+  $sql = "ALTER TABLE {gallery_assist} IF EXISTS DROP `cooliris`, DROP `cooliris_conf`";
   @db_query($sql);
   
   // Delete the Cooliris columns.