Fix compile error for Windows from previous checkin r19758.
Description:
Previous log:
Improve h5diff performance.
The following changes for improving h5diff performance:
1) use HDmemcmp() before comparing each elements
(memcmp() is very fast at both linew and jam)
2) replace the expensive H5Tequals() calls
3) retrieve datatype information at dataset level not each element level
for compound datasets
Tested:
jam (linux32-LE), Windows
bea08cb3a8