vchoi_fork

[svn-r17108] Purpose: Fix bug in H5Z_filter_info

Description:
Previously, when H5Z_filter_info was called for a filter that was not present,
it would succeed and return the information from one position past the end of
the pipeline, possibly causing a segfault.  This affected at least
H5Pget_fitler_by_id1/2, and possibly other API functions.  Fixed to properly
return failure.

Tested: jam, linew, smirom (h5committest)