hdf5_der

[svn-r22187] Purpose: Fix dsets failure on ostrich

Description:
The "support" and "unsupport" chunk index callbacks took H5D_chunk_common_ud_t
udata pointers, which seems reasonable because the udata is only needed to
locate the chunk, and does not need to return anything to the callers.  However,
for v1 b-trees, H5D_btree_found must be called in order to locate the chunk, and
this function assumes that the udata is an H5D_chunk_ud_t and writes to fields
that are not in H5D_chunk_common_ud_t.  Modified the support and unsupport
callbacks to take H5D_chunk_ud_t.

Note: h5watch still fails

Tested: durandal, ostrich