[gtk/wip/baedert/for-master] transform: Fix identity transform fast paths

[Timm Bäder <baedert src gnome org>]

commit 4ad67ba452819550e19245fe04f324b870077cd2
Author: Timm Bäder <mail baedert org>
Date:   Sat Jul 6 12:56:28 2019 +0200

    transform: Fix identity transform fast paths
    
    Returning an extra ref will cause leaks later.

 gsk/gsktransform.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/gsk/gsktransform.c b/gsk/gsktransform.c
index 9af2ce352b..963ca699ed 100644
--- a/gsk/gsktransform.c
+++ b/gsk/gsktransform.c
@@ -646,7 +646,7 @@ gsk_transform_translate_3d (GskTransform             *next,
   GskTranslateTransform *result;
 
   if (graphene_point3d_equal (point, graphene_point3d_zero ()))
-    return gsk_transform_ref (next);
+    return next;
 
   if (gsk_transform_has_class (next, &GSK_TRANSLATE_TRANSFORM_CLASS))
     {
@@ -801,7 +801,7 @@ gsk_transform_rotate (GskTransform *next,
   GskRotateTransform *result;
 
   if (angle == 0.0f)
-    return gsk_transform_ref (next);
+    return next;
 
   if (gsk_transform_has_class (next, &GSK_ROTATE_TRANSFORM_CLASS))
     {
@@ -932,7 +932,7 @@ gsk_transform_rotate_3d (GskTransform          *next,
     return gsk_transform_rotate (next, angle);
 
   if (angle == 0.0f)
-    return gsk_transform_ref (next);
+    return next;
 
   result = gsk_transform_alloc (&GSK_ROTATE3D_TRANSFORM_CLASS,
                                 GSK_TRANSFORM_CATEGORY_3D,
@@ -1121,7 +1121,7 @@ gsk_transform_scale_3d (GskTransform *next,
   GskScaleTransform *result;
 
   if (factor_x == 1 && factor_y == 1 && factor_z == 1)
-    return gsk_transform_ref (next);
+    return next;
 
   if (gsk_transform_has_class (next, &GSK_SCALE_TRANSFORM_CLASS))
     {
@@ -1250,7 +1250,7 @@ gsk_transform_perspective (GskTransform *next,
                            float         depth)
 {
   GskPerspectiveTransform *result;
-  
+
   if (gsk_transform_has_class (next, &GSK_PERSPECTIVE_TRANSFORM_CLASS))
     {
       GskTransform *r = gsk_transform_perspective (gsk_transform_ref (next->next),