vchoi_fork

[svn-r6844] Purpose:
bug fix

Description:
datasets with different storage datatypes where not read to memory to same size types

Solution:
obtain the memory type and size, for the TWO datasets ,
with the "fixtype" function
"upgrade" the smaller size to the larger if they are different
added H5DIFF_DEBUG flag for print information

Platforms tested:
Linux 2.4 (rockaway)
SunOS 5.7 (arabica, 64bit mode)
IRIX 6.5 (modi4)



Misc. update: