vchoi_fork

[svn-r10180] Purpose: New way to do conversion test from floating-point to integer.

Description: This is the 3rd step of change conversion test.  This checkin is
only for conversion from floating-point to integer.

Solution:  The source buffer is filled in with normalized and denormalized
floating-point values.  For the normalized values, it starts from FLT(DBL, or
LDBL)_MIN, multiplied by 10(10000 for double, 100000000 for long double) for
the next value, until reaches to FLT_MAX.  For denormalized values, the
exponent part is always 0.  Mantissa part starts with 000...001, 000...011,
000...111, until reaches to 111...111.  The same is with negative values.

Platforms tested: h5committest and fuss.