[mutter/gbsneto/graphene2: 44/45] cogl/matrix: Fix rotation

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 142828005444e13c7edeaf751aaab6a90a9f75fd
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Mar 12 14:35:33 2019 -0300

    cogl/matrix: Fix rotation

 cogl/cogl/cogl-matrix.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/cogl/cogl/cogl-matrix.c b/cogl/cogl/cogl-matrix.c
index 449e90b03..70393f340 100644
--- a/cogl/cogl/cogl-matrix.c
+++ b/cogl/cogl/cogl-matrix.c
@@ -156,14 +156,11 @@ cogl_matrix_rotate (CoglMatrix *matrix,
                    float y,
                    float z)
 {
-  graphene_matrix_t rotation, m;
+  graphene_matrix_t m;
   graphene_vec3_t r;
 
   cogl_matrix_to_graphene_matrix (matrix, &m);
-
-  graphene_matrix_init_rotate (&rotation, angle, graphene_vec3_init (&r, x, y, z));
-  graphene_matrix_multiply (&rotation, &m, &m);
-
+  graphene_matrix_rotate (&m, angle, graphene_vec3_init (&r, x, y, z));
   graphene_matrix_to_cogl_matrix (&m, matrix);
 
   _COGL_MATRIX_DEBUG_PRINT (matrix);