qtest: Use qemu_opt_set() instead of qemu_opts_parse()

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

qtest.c

diff --git a/qtest.c b/qtest.c
index 2bca04e..8d1e66c 100644
--- a/qtest.c
+++ b/qtest.c
@@ -520,16 +520,13 @@
     }
 }
 
-static void configure_qtest_icount(const char *options)
-{
-    QemuOpts *opts  = qemu_opts_parse(qemu_find_opts("icount"), options, 1);
-    configure_icount(opts, &error_abort);
-    qemu_opts_del(opts);
-}
-
 static int qtest_init_accel(MachineState *ms)
 {
-    configure_qtest_icount("0");
+    QemuOpts *opts = qemu_opts_create(qemu_find_opts("icount"), NULL, 0,
+                                      &error_abort);
+    qemu_opt_set(opts, "shift", "0", &error_abort);
+    configure_icount(opts, &error_abort);
+    qemu_opts_del(opts);
     return 0;
 }