2008-09-16  Nicholaz Beresford  <nicholaz@blueflash.cc>

	* linden/indra/newview/lltexturecache.cpp:
	VWR-3878: Purging cache textures causes viewer to pause for many
	seconds, with heavy disk activity.
	* linden/indra/newview/lltexturecache.h:
	Ditto.