[mutter] monitor-config-manager-kms: Fix is_transform_handled

[Carlos Garnacho <carlosg src gnome org>]

commit 7e3a780dcdabaff6ff94fddec7995681029b2f9a
Author: Hans de Goede <hdegoede redhat com>
Date:   Sun Sep 17 16:21:46 2017 +0200

    monitor-config-manager-kms: Fix is_transform_handled
    
    meta_monitor_manager_kms_is_transform_handled should checked the
    transform passed as function argument, not the current crtc transform.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=787836

 src/backends/native/meta-monitor-manager-kms.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/backends/native/meta-monitor-manager-kms.c b/src/backends/native/meta-monitor-manager-kms.c
index 6507e51..23a79ae 100644
--- a/src/backends/native/meta-monitor-manager-kms.c
+++ b/src/backends/native/meta-monitor-manager-kms.c
@@ -1782,7 +1782,7 @@ meta_monitor_manager_kms_is_transform_handled (MetaMonitorManager  *manager,
 {
   MetaCrtcKms *crtc_kms = crtc->driver_private;
 
-  if ((1 << crtc->transform) & crtc_kms->all_hw_transforms)
+  if ((1 << transform) & crtc_kms->all_hw_transforms)
     return TRUE;
   else
     return FALSE;