Change LEAP_CHECK() to the more descriptive IS_LEAP()
Change LEAP_CHECK() to the more descriptive IS_LEAP()

Fix exceptional x00 changes when the gmtime is in the new year and the
local time is not.  Make sure we don't cross back into a leap year.



git-svn-id: 490c1712b1860e43423339c5f5fb87aa5a1555d0@7 95f99ffb-5155-0410-b9a3-cdf7dd7c4864

foxtacles/y2038,foxtacles/y2038,schwern/y2038,schwern/y2038,chromatic/y2038,evalEmpire/y2038,bulk88/y2038,bulk88/y2038,bulk88/y2038,chromatic/y2038,evalEmpire/y2038,chromatic/y2038