(svn r5210) Many small changes which piled up: const, unsigned, variable scope, CSE for readability, DeMorgan, if cascades -> switch, whitespace, parentheses, bracing, misc.
/* $Id */
KNOWN BUGS / PROBLEMS:
Normal and elrail depots look the same. Use 'X' (transparent buildings)
to distinguish between them
Missing curors / icons for construction (currently using the conventional ones)