Fix the test_substitution test

In r391947, the CDR function was modified such that it will return a
value for the start,answer, and end times if asked. That time will just
be 0 if it hasn't happened yet.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@392190 65c4cc65-6c06-0410-ace0-fbb531ad65f3

tests/test_substitution.c

@@ -286,7 +286,7 @@ AST_TEST_DEFINE(test_substitution)
 	pbx_builtin_setvar_helper(c, "list1", "ab&cd&ef");
 	TEST(test_expected_result(test, c, "${LISTFILTER(list1,&,cd)}", "ab&ef"));
 	TEST(test_expected_result(test, c, "${SHELL(printf '%d' 123)},${SHELL(printf '%d' 456)}", "123,456"));
-	TEST(test_expected_result(test, c, "${foo},${CDR(answer)},${SHELL(printf '%d' 456)}", "123,,456"));
+	TEST(test_expected_result(test, c, "${foo},${CDR(answer)},${SHELL(printf '%d' 456)}", "123,0.000000,456"));
 	TEST(test_expected_result(test, c, "${foo},${this_does_not_exist},${THIS_DOES_NOT_EXIST(either)}", "123,,"));
 #undef TEST