qemuMonitorJSONBlockdevAdd: Refactor cleanup

Use automatic variable freeing and get rid of the cleanup section.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NDaniel Henrique Barboza <danielhb413@gmail.com>

src/qemu/qemu_monitor_json.c

@@ -8823,25 +8823,19 @@ int
 qemuMonitorJSONBlockdevAdd(qemuMonitorPtr mon,
                            virJSONValuePtr props)
 {
-    virJSONValuePtr cmd;
-    virJSONValuePtr reply = NULL;
-    int ret = -1;
+    g_autoptr(virJSONValue) cmd = NULL;
+    g_autoptr(virJSONValue) reply = NULL;
 
     if (!(cmd = qemuMonitorJSONMakeCommandInternal("blockdev-add", props)))
         return -1;
 
     if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
-        goto cleanup;
+        return -1;
 
     if (qemuMonitorJSONCheckError(cmd, reply) < 0)
-        goto cleanup;
-
-    ret = 0;
+        return -1;
 
- cleanup:
-    virJSONValueFree(cmd);
-    virJSONValueFree(reply);
-    return ret;
+    return 0;
 }