[gtk+/wip/alexl/broadway4] broadway: Fix texture hash function

[Alexander Larsson <alexl src gnome org>]

commit 0025ef0ebb2aaf735c4f74c9367d77d0da78905f
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Nov 30 17:30:27 2017 +0100

    broadway: Fix texture hash function

 gdk/broadway/gdkdisplay-broadway.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk/broadway/gdkdisplay-broadway.c b/gdk/broadway/gdkdisplay-broadway.c
index 4d1b0a4..528d33c 100644
--- a/gdk/broadway/gdkdisplay-broadway.c
+++ b/gdk/broadway/gdkdisplay-broadway.c
@@ -111,8 +111,8 @@ gdk_texture_hash (GdkTexture *self)
   data = cairo_image_surface_get_data (surface);
   stride = cairo_image_surface_get_stride (surface);
 
-  width = MAX (self->width, 4);
-  height = MAX (self->height, 4);
+  width = MIN (self->width, 4);
+  height = MIN (self->height, 4);
 
   sum = 0;
   for (y = 0; y < height; y++, data += stride)