monitor: don't try to initialize json parser when monitor is HMP

Reported-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit 26efaca377e004b79ff50a6e936d029a0c095b8b)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

monitor.c

@@ -4605,13 +4605,13 @@ void monitor_init(CharDriverState *chr, int flags)
         qemu_chr_add_handlers(chr, monitor_can_read, monitor_control_read,
                               monitor_control_event, mon);
         qemu_chr_fe_set_echo(chr, true);
+
+        json_message_parser_init(&mon->mc->parser, handle_qmp_command);
     } else {
         qemu_chr_add_handlers(chr, monitor_can_read, monitor_read,
                               monitor_event, mon);
     }
 
-    json_message_parser_init(&mon->mc->parser, handle_qmp_command);
-
     QLIST_INSERT_HEAD(&mon_list, mon, entry);
     if (!default_mon || (flags & MONITOR_IS_DEFAULT))
         default_mon = mon;