gsk: Fix a transform leak

This was found by running our testsuite under asan.

1 files changed, 2 insertions, 1 deletions

diff --git a/gsk/gsktransform.c b/gsk/gsktransform.c
index 002a52a89b..aed9eae994 100644
--- a/gsk/gsktransform.c
+++ b/gsk/gsktransform.c
@@ -123,7 +123,8 @@ gsk_transform_alloc (const GskTransformClass *transform_class,
 
   self->transform_class = transform_class;
   self->category = next ? MIN (category, next->category) : category;
-  self->next = gsk_transform_is_identity (next) ? NULL : next;
+  self->next = gsk_transform_is_identity (next) ? NULL : gsk_transform_ref (next);
+  g_clear_pointer (&next, gsk_transform_unref);
 
   return self;
 }