Fix compilation of image.c on non-Cairo systems

* src/image.c (image_frame_cache_size): pixmap->width etc is only
defined on Cairo.  Return 0 for now on other systems.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/image.c b/src/image.c
index 38887ced25b..8607b33a7a8 100644
--- a/src/image.c
+++ b/src/image.c
@@ -1805,9 +1805,11 @@ image_frame_cache_size (struct frame *f)
     {
       struct image *img = c->images[i];
 
+#ifdef USE_CAIRO
       if (img)
         total += img->pixmap->width * img->pixmap->height  *
           img->pixmap->bits_per_pixel / 8;
+#endif
     }
   return total;
 }