Fix obstacle placement to respect EmptyReserved

src/post_processing.rs

@@ -60,7 +60,10 @@ pub fn fix_edge_bugs(gen: &mut Generator) -> Result<Array2<bool>, &'static str>
 /// Using a distance transform this function will fill up all empty blocks that are too far
 /// from the next solid/non-empty block
 pub fn fill_open_areas(gen: &mut Generator, max_distance: &f32) -> Array2<f32> {
-    let grid = gen.map.grid.map(|val| *val != BlockType::Empty);
+    let grid = gen
+        .map
+        .grid
+        .map(|val| *val != BlockType::Empty && *val != BlockType::EmptyReserved);
 
     // euclidean distance transform
     let distance = dt_bool::<f32>(&grid.into_dyn())