[gtk/ci-jobs: 2/7] Silence compiler warnings in non-debug builds

[Emmanuele Bassi <ebassi src gnome org>]

commit 47c44644b109e0ec1757c83786de2d5a0785675e
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Jan 29 14:02:41 2020 +0100

    Silence compiler warnings in non-debug builds

 gsk/gl/gskglrenderer.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index 44d8115dbb..011bbb18b8 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -2845,17 +2845,18 @@ gsk_gl_renderer_unrealize (GskRenderer *renderer)
 static void
 gsk_gl_renderer_clear_tree (GskGLRenderer *self)
 {
-  int removed_textures;
-
   if (self->gl_context == NULL)
     return;
 
   gdk_gl_context_make_current (self->gl_context);
 
   ops_reset (&self->op_builder);
-  removed_textures = gsk_gl_driver_collect_textures (self->gl_driver);
+
+#ifdef G_ENABLE_DEBUG
+  int removed_textures = gsk_gl_driver_collect_textures (self->gl_driver);
 
   GSK_RENDERER_NOTE (GSK_RENDERER (self), OPENGL, g_message ("Collected: %d textures", removed_textures));
+#endif
 }
 
 static void
@@ -3050,7 +3051,7 @@ add_offscreen_ops (GskGLRenderer         *self,
   graphene_matrix_t prev_projection;
   graphene_rect_t prev_viewport;
   graphene_matrix_t item_proj;
-  float prev_opacity;
+  float prev_opacity = 1.0;
   int texture_id = 0;
 
   if (node_is_invisible (child_node))