[gtk/wip/matthiasc/popup5: 128/150] color plane: Don't allocate 0-size textures

[Matthias Clasen <matthiasc src gnome org>]

commit 440df62b9590b4ac430b3c2d90d718447625bc10
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon May 20 12:49:56 2019 +0000

    color plane: Don't allocate 0-size textures
    
    This triggers critials, and does us no good.

 gtk/gtkcolorplane.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gtk/gtkcolorplane.c b/gtk/gtkcolorplane.c
index 2c2867a28a..f6eaf311a0 100644
--- a/gtk/gtkcolorplane.c
+++ b/gtk/gtkcolorplane.c
@@ -129,6 +129,9 @@ create_texture (GtkColorPlane *plane)
   width = gtk_widget_get_width (widget);
   height = gtk_widget_get_height (widget);
 
+  if (width == 0 || height == 0)
+    return;
+
   g_clear_object (&plane->priv->texture);
 
   stride = width * 4;