branches/5.1:

Merge a change from MySQL:

  ------------------------------------------------------------
  revno: 2747
  committer: Timothy Smith <timothy.smith@sun.com>
  branch nick: 51
  timestamp: Fri 2009-01-16 17:49:07 +0100
  message:
    Add another cast to ignore int/ulong difference in error types, silence warning on Win64
  modified:
    storage/innobase/handler/ha_innodb.cc

handler/ha_innodb.cc

@@ -3702,7 +3702,7 @@ ha_innobase::write_row(
 
 			/* We don't want to mask autoinc overflow errors. */
 			if (prebuilt->autoinc_error != DB_SUCCESS) {
-				error = prebuilt->autoinc_error;
+				error = (int) prebuilt->autoinc_error;
 
 				goto report_error;
 			}