3d:: racing:: increased TWIDTH in binary3, as otherwise it could not create paths

racing.cpp

@@ -238,6 +238,7 @@ ld start_line_width;
 void generate_track() {
 
   TWIDTH = getDistLimit() - 1;  
+  if(binarytiling && DIM == 3) TWIDTH++;
 
   #if CAP_FILES
   if(ghostset().empty())