rtl: fix loading of long integer values to float properties 

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24947 3ad0048d-3df7-0310-abae-a5850022a9f2
+ added function cpubase.segment_regs_equal, which checks whether 2 segment regs are equal in the current memory model

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24949 3ad0048d-3df7-0310-abae-a5850022a9f2