talloc: ASAN fix for test_magic_protection

Direct leak of 1152 byte(s) in 1 object(s) allocated from:
     #0 0x7f06393dfc08 in __interceptor_malloc (/lib64/libasan.so.5+0xefc08)
     samba-team#1 0x7f06392cfd59 in __talloc_with_prefix ../../talloc.c:782
     samba-team#2 0x7f06392cfd59 in _talloc_pool ../../talloc.c:837
     samba-team#3 0x7f06392cfd59 in talloc_pool ../../talloc.c:859
     samba-team#4 0x40b83c in test_magic_protection ../../testsuite.c:1960
     samba-team#5 0x40b83c in torture_local_talloc ../../testsuite.c:2164
     samba-team#6 0x402603 in main ../../testsuite_main.c:32
     samba-team#7 0x7f063908a412 in __libc_start_main (/lib64/libc.so.6+0x24412)

Signed-off-by: Swen Schillig <[email protected]>
Reviewed-by: Andrew Bartlett <[email protected]>
Reviewed-by: Matthias Dieter Wallnöfer <[email protected]>

lib/talloc/testsuite.c

@@ -1999,6 +1999,8 @@ static bool test_magic_protection(void)
 
 	while (wait(&exit_status) != pid);
 
+	talloc_free(pool); /* make ASAN happy */
+
 	if (!WIFEXITED(exit_status)) {
 		printf("Child exited through unexpected abnormal means\n");
 		return false;