InnoDB: Check all referencing tables in DROP DATABASE (Bug #10335).

innobase/row/row0mysql.c:
  row_drop_table_for_mysql(): Check all referencing tables
  when drop_db==TRUE (Bug #10335)

innobase/row/row0mysql.c

@@ -2143,6 +2143,7 @@ row_drop_table_for_mysql(
 	foreign = UT_LIST_GET_FIRST(table->referenced_list);
 	
 	while (foreign && foreign->foreign_table == table) {
+	check_next_foreign:
 		foreign = UT_LIST_GET_NEXT(referenced_list, foreign);
 	}
 
@@ -2171,6 +2172,10 @@ row_drop_table_for_mysql(
 		goto funct_exit;
 	}
 
+	if (foreign && trx->check_foreigns) {
+		goto check_next_foreign;
+	}
+
 	if (table->n_mysql_handles_opened > 0) {
 		ibool	added;