guard against double-finishshape

3d-models.cpp

@@ -1088,8 +1088,8 @@ void make_3d_models() {
     }
   last->flags |= POLY_TRIANGLES;
   add_texture(*last);
-  finishshape();
   if(WDIM == 2) shift_last_straight(geom3::FLOOR);
+  finishshape();
   shJelly = shSlime;
   
   shift_shape(shMagicSword, geom3::ABODY);

polygons.cpp

@@ -1882,6 +1882,7 @@ void finishshape() {
   if(allminus || allplus) last->flags |= POLY_VCONVEX;
   
   allshapes.push_back(last);
+  last = NULL;
 
   /* if(isnan(area)) ;
   else if(intval(hpc[last->s], hpc[last->e-1]) > 1e-6)