vchoi_fork

[svn-r10658] Purpose:
Bug fix

Description:
The intel compiler on windows doesn't support long long to double conversion.

Solution:
Added a flag  H5_LLONG_TO_FP_CAST_WORKS.  When it is not defined, the data transform will issue
an error when someone tries to perform a transform from long long to double and the long long to double
dtransform test will be skipped.

Platforms tested:
heping, sol, copper

Misc. update: