[gtk] gsk: Fix the compiler warning differently

[Matthias Clasen <matthiasc src gnome org>]

commit a66ed7c461b233e725f881ceca725301aa644efa
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Feb 13 10:42:21 2020 -0500

    gsk: Fix the compiler warning differently

 gsk/gl/gskglrenderer.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index 015c0984f2..f98527fb98 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -2897,8 +2897,6 @@ gsk_gl_renderer_unrealize (GskRenderer *renderer)
 static void
 gsk_gl_renderer_clear_tree (GskGLRenderer *self)
 {
-  int removed_textures;
-
   if (self->gl_context == NULL)
     return;
 
@@ -2906,10 +2904,11 @@ gsk_gl_renderer_clear_tree (GskGLRenderer *self)
 
   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));
+#else
+  gsk_gl_driver_collect_textures (self->gl_driver);
 #endif
 }