fix floorshapes for non-football colorable arbs, and also set is_football_colorable correctly for converted ones

arbitrile.cpp

@@ -2096,6 +2096,7 @@ EX void convert() {
   arb::compute_vertex_valence(ac);
 
   ac.have_ph = geosupport_football() ? 1 : 0;
+  ac.is_football_colorable = geosupport_football() >= 2;
   arb::check_football_colorability(ac);
   }
 

floorshapes.cpp

@@ -408,6 +408,7 @@ void geometry_information::generate_floorshapes_for(int id, cell *c) {
     auto& c = arb::current;
     siid = c.shapes[id].football_type >= 2;
     sidir = c.shapes[id].football_type == 1;
+    if(!c.is_football_colorable) siid = 1;
     }
   
   else if(geometry == gBinary4) {