[PATCH] test-tool run-command: fix confusing init pattern

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

In be5d88e1128 (test-tool run-command: learn to run (parts of) the
testsuite, 2019-10-04) an init pattern was added that would use
TESTSUITE_INIT, but then promptly memset() everything back to 0. We'd
then set the "dup" on the two string lists. Our setting of "next" to
"-1" thus did nothing, we'd reset it to "0" before using it.

Let's just use the init macro for the STRING_LIST members, we can then
remove the already redundant memset().

Note that while we compile this code, there's no in-tree user for the
"testsuite" target being modified here anymore, see the discussion at
and around <nycvar.QRO.7.76.6.2109091323150.59@tvgsbejvaqbjf.bet>[1].

1. https://lore.kernel.org/git/nycvar.QRO.7.76.6.2109091323150.59@tvgsbejvaqbjf.bet/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---

This patch is the immediate reason for why I submitted
https://lore.kernel.org/git/patch-1.1-d1e464da0a9-20210906T002938Z-avarab@gmail.com/,
since Johannes would prefer to keep it let's fix this init pattern.

 t/helper/test-run-command.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/t/helper/test-run-command.c b/t/helper/test-run-command.c
index 7ae03dc7123..8e42516bdc1 100644
--- a/t/helper/test-run-command.c
+++ b/t/helper/test-run-command.c
@@ -56,12 +56,15 @@ static int task_finished(int result,
 }
 
 struct testsuite {
-	struct string_list tests, failed;
+	struct string_list tests;
+	struct string_list failed;
 	int next;
 	int quiet, immediate, verbose, verbose_log, trace, write_junit_xml;
 };
-#define TESTSUITE_INIT \
-	{ STRING_LIST_INIT_DUP, STRING_LIST_INIT_DUP, -1, 0, 0, 0, 0, 0, 0 }
+#define TESTSUITE_INIT { \
+	.tests = STRING_LIST_INIT_DUP, \
+	.failed = STRING_LIST_INIT_DUP, \
+}
 
 static int next_test(struct child_process *cp, struct strbuf *err, void *cb,
 		     void **task_cb)
@@ -142,9 +145,6 @@ static int testsuite(int argc, const char **argv)
 		OPT_END()
 	};
 
-	memset(&suite, 0, sizeof(suite));
-	suite.tests.strdup_strings = suite.failed.strdup_strings = 1;
-
 	argc = parse_options(argc, argv, NULL, options,
 			testsuite_usage, PARSE_OPT_STOP_AT_NON_OPTION);
 
-- 
2.33.0.867.g88ec4638586