Index: obj_poly.h
===================================================================
--- obj_poly.h	(revision 30832)
+++ obj_poly.h	(revision 30833)
@@ -95,6 +95,10 @@
 
 double pcb_poly_area(const pcb_poly_t *poly);
 
+/* Returns whether p is valid, without ever asserting */
+int pcb_poly_is_valid(pcb_poly_t *p);
+
+
 /* called from main.c to free some caches */
 void pcb_poly_uninit(void);