[mutter] cursor-renderer/native: Fix type in unset_crtc_cursor_renderer_privates

[Robert Mader <rmader src gnome org>]

commit 10c7ab2dec0098a2c868af403d3351bf4da80a1f
Author: Michel Dänzer <mdaenzer redhat com>
Date:   Tue Jul 12 17:09:01 2022 +0200

    cursor-renderer/native: Fix type in unset_crtc_cursor_renderer_privates
    
    Since the commit below, meta_crtc_kms_get_cursor_renderer_private has
    returned a CrtcCursorData pointer, but this code was still treating it
    as a MetaDrmBuffer pointer.
    
    Fixes: fea8ebcca9e1 ("cursor-renderer/native: Store struct in CRTC private")
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2524>

 src/backends/native/meta-cursor-renderer-native.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/backends/native/meta-cursor-renderer-native.c 
b/src/backends/native/meta-cursor-renderer-native.c
index 96c54baf02..7da9b2c5ab 100644
--- a/src/backends/native/meta-cursor-renderer-native.c
+++ b/src/backends/native/meta-cursor-renderer-native.c
@@ -1104,11 +1104,11 @@ unset_crtc_cursor_renderer_privates (MetaGpu       *gpu,
   for (l = meta_gpu_get_crtcs (gpu); l; l = l->next)
     {
       MetaCrtcKms *crtc_kms = META_CRTC_KMS (l->data);
-      MetaDrmBuffer *crtc_buffer;
+      CrtcCursorData *crtc_cursor_data;
 
-      crtc_buffer = meta_crtc_kms_get_cursor_renderer_private (crtc_kms);
-      if (buffer == crtc_buffer)
-        meta_crtc_kms_set_cursor_renderer_private (crtc_kms, NULL, NULL);
+      crtc_cursor_data = meta_crtc_kms_get_cursor_renderer_private (crtc_kms);
+      if (crtc_cursor_data && buffer == crtc_cursor_data->buffer)
+        crtc_cursor_data->buffer = NULL;
     }
 }