Author: Ole Streicher <debian@liska.ath.cx>
Description: If a unrecoverable error occurred, abort() instead of exit()
 to allow the user for tracing the problem.
--- a/libwcs/poly.c
+++ b/libwcs/poly.c
@@ -43,7 +43,7 @@
 void	qerror(char *msg1, char *msg2)
   {
   fprintf(stderr, "\n> %s%s\n\n",msg1,msg2);
-  exit(-1);
+  abort();
   }