Amend farmland rendering

- Use 'moisture' property to determine when to render farmland as moist

overviewer_core/world.py

@@ -1165,6 +1165,9 @@ class RegionSet(object):
             data = {'save': 0, 'load': 1, 'corner': 2, 'data': 3}.get(block_mode, 0)
         elif key == 'minecraft:cake':
             data = int(palette_entry['Properties'].get('bites', '0'))
+        elif key == 'minecraft:farmland':
+            # A moisture level of 7 has a different texture from other farmland
+            data = 1 if palette_entry['Properties'].get('moisture', '0') == '7' else 0
 
         return (block, data)