dix: InitPredictableAccelerationScheme: avoid memory leak on failure

Clears warning from gcc 14.1:

../dix/ptrveloc.c: In function ‘InitPredictableAccelerationScheme’:
../dix/ptrveloc.c:149:9: warning: leak of ‘<unknown>’
 [CWE-401] [-Wanalyzer-malloc-leak]
  149 |         free(vel);
      |         ^~~~~~~~~

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1673>

1 files changed, 1 insertions, 0 deletions

diff --git a/dix/ptrveloc.c b/dix/ptrveloc.c
index 5166288e8..ee5a24c9e 100644
--- a/dix/ptrveloc.c
+++ b/dix/ptrveloc.c
@@ -146,6 +146,7 @@ InitPredictableAccelerationScheme(DeviceIntPtr dev,
     schemeData->vel = vel;
     scheme.accelData = schemeData;
     if (!InitializePredictableAccelerationProperties(dev, vel, schemeData)) {
+        FreeVelocityData(vel);
         free(vel);
         free(schemeData);
         return FALSE;