Fix: old snow_line_height had a higher maximum value than could be stored

So any old game made with this setting was overflowing anyway;
not really a lot we can do about that now.

src/table/gameopt_settings.ini

@@ -149,7 +149,8 @@ var      = game_creation.snow_line_height
 type     = SLE_UINT8
 def      = DEF_SNOWLINE_HEIGHT * TILE_HEIGHT
 min      = MIN_SNOWLINE_HEIGHT * TILE_HEIGHT
-max      = MAX_SNOWLINE_HEIGHT * TILE_HEIGHT
+# "max" used to be MAX_SNOWLINE_HEIGHT * TILE_HEIGHT, but this would overflow the storage.
+max      = UINT8_MAX
 to       = SLV_22
 
 [SDT_NULL]