Index: firmware/drivers/lcd-16bit.c
===================================================================
--- firmware/drivers/lcd-16bit.c	(revision 18355)
+++ firmware/drivers/lcd-16bit.c	(working copy)
@@ -515,7 +515,7 @@
     }
 
     /* nothing to draw? */
-    if ((x >= current_vp->width) || 
+    if (((unsigned)x >= (unsigned)current_vp->width) || 
         (y1 >= current_vp->height) ||
         (y2 < 0))
         return;