* Reverted overflow/underflow handling in fpc_exp_real to original state of C port. In particular, changed constant values to typed constants. Resolves #24839.
* Values like "huge" or "twom1000" must be declared as typed constants, so expressions using them are evaluated at runtime. E.g. "huge*huge" will either raise an overflow exception or will be evaluated as infinity, if overflows are masked. Calling float_raise() is not necessary anymore.
* Also replaced round() by trunc() when converting double to integer, this is how C defines such conversions.


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25945 3ad0048d-3df7-0310-abae-a5850022a9f2