From 9560b439213a51898d0c018ffc3e1fdc8bcaddbd Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Fri, 28 Feb 2020 10:34:29 +0100
Subject: hdfile_get_value(): Check that ev->dim_length > 0 before looking in
 dim_entries

---
 libcrystfel/src/hdf5-file.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libcrystfel/src/hdf5-file.c b/libcrystfel/src/hdf5-file.c
index d6f25729..a7430fb2 100644
--- a/libcrystfel/src/hdf5-file.c
+++ b/libcrystfel/src/hdf5-file.c
@@ -1236,7 +1236,9 @@ int hdfile_get_value(struct hdfile *f, const char *name, struct event *ev,
 
 	for ( i=0; i<ndims; i++ ) {
 		if ( size[i] == 1 ) continue;
-		if ( ( i==0 ) && (ev != NULL) && (size[i] > ev->dim_entries[0]) ) {
+		if ( ( i==0 ) && (ev != NULL) && (ev->dim_length > 0)
+		  && (size[i] > ev->dim_entries[0]) )
+		{
 			dim_flag = 1;
 		} else {
 			H5Tclose(type);
-- 
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