[gtk/ngl-uninitialized-matrix] ngl: Fix an uninitialized read

[Matthias Clasen <matthiasc src gnome org>]

commit 2bb48590316289729cb5b2372120c768de65af74
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Mar 27 16:23:40 2021 -0400

    ngl: Fix an uninitialized read
    
    We were using the wrong matrix here.
    valgrind pointed this point.

 gsk/ngl/gsknglrenderjob.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)
---
diff --git a/gsk/ngl/gsknglrenderjob.c b/gsk/ngl/gsknglrenderjob.c
index 8e4246d8b7..026f2be6e7 100644
--- a/gsk/ngl/gsknglrenderjob.c
+++ b/gsk/ngl/gsknglrenderjob.c
@@ -399,7 +399,6 @@ static void
 extract_matrix_metadata (GskNglRenderModelview *modelview)
 {
   float dummy;
-  graphene_matrix_t m;
 
   gsk_transform_to_matrix (modelview->transform, &modelview->matrix);
 
@@ -428,14 +427,14 @@ extract_matrix_metadata (GskNglRenderModelview *modelview)
         /* TODO: 90% sure this is incorrect. But we should never hit this code
          * path anyway. */
         graphene_vec3_init (&col1,
-                            graphene_matrix_get_value (&m, 0, 0),
-                            graphene_matrix_get_value (&m, 1, 0),
-                            graphene_matrix_get_value (&m, 2, 0));
+                            graphene_matrix_get_value (&modelview->matrix, 0, 0),
+                            graphene_matrix_get_value (&modelview->matrix, 1, 0),
+                            graphene_matrix_get_value (&modelview->matrix, 2, 0));
 
         graphene_vec3_init (&col2,
-                            graphene_matrix_get_value (&m, 0, 1),
-                            graphene_matrix_get_value (&m, 1, 1),
-                            graphene_matrix_get_value (&m, 2, 1));
+                            graphene_matrix_get_value (&modelview->matrix, 0, 1),
+                            graphene_matrix_get_value (&modelview->matrix, 1, 1),
+                            graphene_matrix_get_value (&modelview->matrix, 2, 1));
 
         modelview->scale_x = graphene_vec3_length (&col1);
         modelview->scale_y = graphene_vec3_length (&col2);