BETA: Fixing minor NPE in DimensionalRift.
		* Reported by: lucan
		* Tested by: lucan
		* Patch by: UnAfraid
	* Adding usage of L2Object.calculateDistance in L2World.
		* Reviewed by: Zoey76
	

git-svn-id: http://svn.l2jserver.com/branches/unstable/L2J_Server_BETA@6253 d34dfa0f-f91c-0410-86dd-cf06f19dd0ad