[Click] StoreIPAddress not 64bit safe

[Harald Schioeberg]

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this segfaults on amd64 in StoreIPAddress::simple_action

RatedSource("some data", 1, 1, STOP true) ->
        UDPIPEncap(1.0.0.1, 1234, 2.0.0.2, 1234) ->
        StoreIPAddress(3.0.0.3, dst) ->
	CheckIPHeader ->      // verify that incremental csum still work
        IPPrint ->
        Discard ;


the attached patch makes the thing work as expected:

$ ./userlevel/click ./conf/storeip.click
1258295906.133130: 1.0.0.1.1234 > 3.0.0.3.1234: udp 17

	harald

ps. "_offset = (unsigned) -16" ... interesting magic ;-)

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