fixed MAXMDIM guards

hyperpoint.cpp

@@ -1193,5 +1193,12 @@ EX ld raddif(ld a, ld b) {
   return d;
   }
 
+EX int bucketer(ld x) {
+  return int(x * 10 + 100000.5) - 100000;
+  }
+
+EX int bucketer(hyperpoint h) {
+  return bucketer(h[0]) + 1000 * bucketer(h[1]) + 1000000 * bucketer(h[2]);
+  }  
 
 }