(svn r3212) - Waypoints/Depots: Store waypoint index in m2 for waypoints. This moves the ground type bits from m2 to m4 for waypoints and depots (leaving room for depot index in m2 in future), and moves the custom graphics ID to the waypoint struct.
- Waypoints: Until now stat_id was saved but never assigned to. Instead we now save the GRFID/local index of the custom graphics so that GRF file changes can leave graphics intact.

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		.CODE

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PUBLIC	_get_save_esp

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_get_save_esp:

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		MOV	RAX,RSP

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		RET

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PUBLIC	_rdtsc

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_rdtsc:

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		RDTSC

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		MOV RCX,RDX

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		SHL RCX,32

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		AND RAX,0FFFFFFFFh

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		OR  RAX,RCX

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		RET

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		END