hdf5_der

[svn-r16764] To fix a bug in extensible arrays as chunk index:
When the dataset is closed in H5D_close(), the pointer
to the extensible array struct in the layout message
is copied via H5D_flush_real() before H5D_chunk_dest().
This causes an abort from "Assertion `ea->hdr' failed"
later when the dataset is re-opened and read.
The bug was fixed by adding a flag to the reset function 
for indexed storage to set/not set the address of the indexed
array. H5O_layout_copy() calls H5D_chunk_idx_reset() to reset
only the pointer of the array struct for the chunked index storage.