fixed bug in Reals.Mod which was actual on x86_64
without prototype, return type of ecvt was int, which has 4 byte size on
x86 but still has the same size on x86_64, that's why pointer which is 8
byte long could not fit in the variable holding return value. And it
could get negative value causing programs to explode. Fixed with casting
the result to LONGINT.
fixed date