[svn-r17109] 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)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/H5Z.c b/src/H5Z.c
index 417ae77..1c58ab0 100644
--- a/src/H5Z.c
+++ b/src/H5Z.c
@@ -1115,7 +1115,7 @@ H5Z_filter_info(const H5O_pline_t *pline, H5Z_filter_t filter)
             break;
 
     /* Check if the filter was not already in the pipeline */
-    if(idx>pline->nused)
+    if(idx>=pline->nused)
 	HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, NULL, "filter not in pipeline")
 
     /* Set return value */