app_voicemail: Fix the "test_voicemail_vm_info" unit test.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/13@420856 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_voicemail.c

@@ -14542,7 +14542,7 @@ AST_TEST_DEFINE(test_voicemail_vm_info)
 
 	populate_defaults(vmu);
 
-	ast_copy_string(vmu->email, "vm-info-test@example.net", sizeof(vmu->email));
+	vmu->email = ast_strdup("vm-info-test@example.net");
 	ast_copy_string(vmu->fullname, "Test Framework Mailbox", sizeof(vmu->fullname));
 	ast_copy_string(vmu->pager, "vm-info-pager-test@example.net", sizeof(vmu->pager));
 	ast_copy_string(vmu->language, "en", sizeof(vmu->language));