many cleanups to fix compiler warnings, streamline iteration over objects
in HDF5 file when opening the file, and generally straightening out the code
to be cleaner and simpler.
Tested on Mac OS/X with gcc 4.8 and OpenMPI (which uses clang).
Added code to verify that enum constants
(and other constants) are consistent
with the type of the variable or
attribute to which they are assigned.
This addresses the ncdump failure.
Ncgen is unable to resolve
ambiguous references to an enum
constant when two different enums
have same econstant name.
Solved by allowing more specific
forms for econstant references.
1. /.../enumname.enumconstname
2. enumname.enumconstname
3. enumconstname
Case 1 is resolved by using the econstant
in the specific enum definition. If none is
found, an error is reported.
Case 2 is resolved by
1. finding an enclosing group with an
enum definition with the specified name
and containing the specified econstant.
If there are more than one, then an error is reported
2. finding all enum definitions in the dataset that have
the specified enum name and contain the specified
econstant. If more than one is found, then an error is reported.
If the above two methods fail, then report an error.
Case 3 is similar to case 2, but all enums, irrespective
of name are used if they contains the specified enum constant.
The ref_tst_econst.cdl test in ncdump is causing ncdump
to fail. So there may be yet some problem.
