Rather than asserting monitor_is_qmp(), use a QOM cast via
MONITOR_QMP which performs an assert already.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 monitor/qmp-cmds-control.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/monitor/qmp-cmds-control.c b/monitor/qmp-cmds-control.c
index ca471bc1c7..8fe0876a3d 100644
--- a/monitor/qmp-cmds-control.c
+++ b/monitor/qmp-cmds-control.c
@@ -72,11 +72,7 @@ static bool qmp_caps_accept(MonitorQMP *mon, QMPCapabilityList *list,
 void qmp_qmp_capabilities(bool has_enable, QMPCapabilityList *enable,
                           Error **errp)
 {
-    Monitor *cur_mon = monitor_cur();
-    MonitorQMP *mon;
-
-    assert(monitor_is_qmp(cur_mon));
-    mon = container_of(cur_mon, MonitorQMP, parent);
+    MonitorQMP *mon = MONITOR_QMP(monitor_cur());
 
     if (mon->commands == &qmp_commands) {
         error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND,
@@ -122,11 +118,7 @@ static void query_commands_cb(const QmpCommand *cmd, void *opaque)
 CommandInfoList *qmp_query_commands(Error **errp)
 {
     CommandInfoList *list = NULL;
-    Monitor *cur_mon = monitor_cur();
-    MonitorQMP *mon;
-
-    assert(monitor_is_qmp(cur_mon));
-    mon = container_of(cur_mon, MonitorQMP, parent);
+    MonitorQMP *mon = MONITOR_QMP(monitor_cur());
 
     qmp_for_each_command(mon->commands, query_commands_cb, &list);
 
-- 
2.53.0