=== modified file 'src/window.c'
--- src/window.c	2014-02-21 08:02:05 +0000
+++ src/window.c	2014-02-21 20:25:41 +0000
@@ -3702,8 +3702,9 @@
   (Lisp_Object window, Lisp_Object size, Lisp_Object add)
 {
   struct window *w = decode_valid_window (window);
-  EMACS_INT size_min = NILP (add) ? 0 : - XINT (w->new_pixel);
-  EMACS_INT size_max = size_min + min (INT_MAX, MOST_POSITIVE_FIXNUM);
+  EMACS_INT new_pixel = NILP (add) ? 0 : XINT (w->new_pixel);
+  EMACS_INT size_min = max (INT_MIN, MOST_NEGATIVE_FIXNUM) - new_pixel;
+  EMACS_INT size_max = min (INT_MAX, MOST_POSITIVE_FIXNUM) - new_pixel;
 
   CHECK_RANGED_INTEGER (size, size_min, size_max);
   if (NILP (add))