FreeDesktop #5667; fixes crash on 64-bits arches

--- poppler-0.8.6/poppler/JPXStream.h	2008-03-26 20:38:52.000000000 +0100
+++ poppler-0.8.6.new/poppler/JPXStream.h	2008-08-20 14:21:34.000000000 +0200
@@ -212,7 +212,7 @@
 
   //----- computed
   Guint x0, y0, x1, y1;		// bounds of the tile-comp, in ref coords
-  Guint cbW;			// code-block width
+  int cbW;			// code-block width
   Guint cbH;			// code-block height
 
   //----- image data