Cleanup after test for Bug#11458

mysql-test/r/ps.result

@@ -620,3 +620,5 @@ execute stmt using @user_id, @id;
 partner_id
 execute stmt using @user_id, @id;
 partner_id
+deallocate prepare stmt;
+drop table t1, t2, t3, t4;

mysql-test/t/ps.test

@@ -648,4 +648,5 @@ set @user_id = 'nicke';
 set @id = '2';
 execute stmt using @user_id, @id;
 execute stmt using @user_id, @id;
-
+deallocate prepare stmt;
+drop table t1, t2, t3, t4;