[fpc-pascal] Nan values SIGFPE exception on 64 bit

[Birger Jansen]

> It should cause an exception everywhere by default (it does on PowerPC  
> 32 bit). You have to use math.setexceptionmask if you want to mask  
> exceptions for invalid floating point operations: 
> http://www.freepascal.org/docs-html/rtl/math/setexceptionmask.html

Thanks, that fixed my problem. Strange though that the test program runs without problems on Win32 and in Delphi.

Kind regards,
  Birger