Return error when updating cdrom device

The commit 84c59ffa improved the way we change ejectable media.
If for any reason the first "eject" didn't open the tray we
should return with error.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

src/qemu/qemu_hotplug.c

@@ -106,6 +106,9 @@ int qemuDomainChangeEjectableMedia(virQEMUDriverPtr driver,
     ret = qemuMonitorEjectMedia(priv->mon, driveAlias, force);
     qemuDomainObjExitMonitor(driver, vm);
 
+    if (ret < 0)
+        goto audit;
+
     virObjectRef(vm);
     /* we don't want to report errors from media tray_open polling */
     while (retries) {
@@ -121,14 +124,11 @@ int qemuDomainChangeEjectableMedia(virQEMUDriverPtr driver,
     virObjectUnref(vm);
 
     if (retries <= 0) {
-        if (ret == 0) {
-            /* If ret == -1, EjectMedia already set an error message */
-            virReportError(VIR_ERR_OPERATION_FAILED, "%s",
-                           _("Unable to eject media"));
-        }
+        virReportError(VIR_ERR_OPERATION_FAILED, "%s",
+                       _("Unable to eject media"));
+        ret = -1;
         goto audit;
     }
-    ret = 0;
 
     src = virDomainDiskGetSource(disk);
     if (src) {