Added a conditional to make sure that there was a citation before creating hyper links.

svn: r18702

src/plugins/webreport/NarrativeWeb.py

@@ -713,12 +713,12 @@ class BasePage(object):
 
         @param: citation_handle_list = list of gen/lib/Citation
         """
-
         lnk = (self.report.cur_fname, self.page_title, self.gid)
         text = ""
         for citation_handle in citation_handle_list:
             citation = self.report.database.get_citation_from_handle(
                                                 citation_handle)
+            if citation:
             
                 # Add the source information to src_list for use when displaying the
                 # Sources page
@@ -734,8 +734,6 @@ class BasePage(object):
                 index, key = self.bibli.add_reference(citation)
                 id_ = "%d%s" % (index+1, key)
                 text += ' [<a href="#sref%s">%s</a>]' % (id_, id_)
-
-        # return citation list text to its callers
         return text
 
     def get_note_format(self, note, link_prefix_up):