Fix for bug 2934.

Check that tvb backing is available before accessing it.

svn path=/trunk/; revision=26393

1 files changed, 6 insertions, 0 deletions

diff --git a/print.c b/print.c
index bdd72a2609..69cc1c7c33 100644
--- a/print.c
+++ b/print.c
@@ -745,6 +745,9 @@ write_pdml_field_hex_value(write_pdml_data *pdata, field_info *fi)
 	int i;
 	const guint8 *pd;
 
+	if (!fi->ds_tvb)
+		return;
+
 	if (fi->length > tvb_length_remaining(fi->ds_tvb, fi->start)) {
 		fprintf(pdata->fh, "field length invalid!");
 		return;
@@ -1550,6 +1553,9 @@ get_field_hex_value(GSList* src_list, field_info *fi)
 {
     const guint8 *pd;
 
+    if (!fi->ds_tvb)
+        return NULL;
+
     if (fi->length > tvb_length_remaining(fi->ds_tvb, fi->start)) {
         return "field length invalid!";
     }