[PATCH xserver] randr: Use RRTransformEqual in RRCrtcPendingTransform

[Aaron Plattner]

Currently, RRCrtcPendingTransform returns false unless the
transformation matrix itself is changing. This makes RRCrtcSet skip
doing anything if the only thing that is changing is the transform
filter.

There's already a function for comparing RRTransformPtrs, so use that
instead.

Tested by running

  xrandr --output DP-1 --mode 1920x1080 --rate 144 --scale 0.5x0.5 --filter nearest

follwed by

  xrandr --output DP-1 --mode 1920x1080 --rate 144 --scale 0.5x0.5 --filter bilinear

Signed-off-by: Aaron Plattner <aplattner at nvidia.com>
---
 randr/rrcrtc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/randr/rrcrtc.c b/randr/rrcrtc.c
index d1a51f0aa341..401a1c178b64 100644
--- a/randr/rrcrtc.c
+++ b/randr/rrcrtc.c
@@ -843,9 +843,8 @@ RRCrtcGetTransform(RRCrtcPtr crtc)
 Bool
 RRCrtcPendingTransform(RRCrtcPtr crtc)
 {
-    return memcmp(&crtc->client_current_transform.transform,
-                  &crtc->client_pending_transform.transform,
-                  sizeof(PictTransform)) != 0;
+    return !RRTransformEqual(&crtc->client_current_transform,
+                             &crtc->client_pending_transform);
 }
 
 /*
-- 
2.13.1