Index: external/sane/sane-frontends/src/preview.c
diff -u external/sane/sane-frontends/src/preview.c:1.3 external/sane/sane-frontends/src/preview.c:1.4
--- sane-frontends/src/preview.c:1.3	Fri Aug  3 13:57:49 2001
+++ sane-frontends/src/preview.c	Thu Nov 29 10:15:33 2001
@@ -871,6 +871,8 @@
 
   p->image_width = width;
   p->image_height = height;
+  if ((width == 0) || (height == 0))
+    return;
   p->image_data = malloc (3*width*height);
   if (!p->image_data)
     return;