Fix test for newer compilers

testsuite/expect/test12.2

@@ -62,7 +62,7 @@ if {[test_launch_poe]} {
 	set launch_poe     1
 } else {
 	set max_time_error 5
-	set max_mem_error  4200
+	set max_mem_error  4300
 	set step_id        0
 	set launch_poe     0
 }