- handled possible case that an Anchor has no Position

  (This used to cause a segm fault)

diff --git a/ext/hyperwave/hg_comm.c b/ext/hyperwave/hg_comm.c
index b65bd8f34b179956276cddeb04373b1b0b5880ca..5682025c5b3f02213245511069a5a64e4d6d30d8 100644 (file)
--- a/ext/hyperwave/hg_comm.c
+++ b/ext/hyperwave/hg_comm.c
@@ -375,7 +375,7 @@ DLIST *fnCreateAnchorList(hw_objectID objID, char **anchors, char **docofanchorr
                           In such a case the Position has the value 'invisible' */
                        str = strstr(object, "Position");
                        str += 9;
-                       if(0 != strncmp(str, "invisible", 9)) {
+                       if((str != 9) && (0 != strncmp(str, "invisible", 9))) {
                                sscanf(str, "0x%X 0x%X", &start, &end);
                
                                /* Determine ObjectID */