[libdocument] Check for NULL in synctex_backward_search.

Taken from evince commit: 26c3b7e6b2fb3ee2d01ec249f7026a37bcfc2f9c
From: José Aliste <[email protected]>
Gnome bug: 630845

1 files changed, 11 insertions, 6 deletions

diff --git a/libdocument/ev-document.c b/libdocument/ev-document.c
index fc45830d..b2c5ab41 100644
--- a/libdocument/ev-document.c
+++ b/libdocument/ev-document.c
@@ -435,11 +435,16 @@ ev_document_synctex_backward_search (EvDocument *document,
                 /* We assume that a backward search returns either zero or one result_node */
                 node = synctex_next_result (scanner);
                 if (node != NULL) {
-                        result = g_new (EvSourceLink, 1);
-                        result->filename = synctex_scanner_get_name (scanner,
-                                                                     synctex_node_tag (node));
-                        result->line = synctex_node_line (node);
-                        result->col = synctex_node_column (node);
+                        const gchar *filename;
+
+			filename = synctex_scanner_get_name (scanner, synctex_node_tag (node));
+
+			if (filename) {
+				result = g_new (EvSourceLink, 1);
+				result->filename = filename;
+				result->line = synctex_node_line (node);
+				result->col = synctex_node_column (node);
+			}
                 }
         }
 
@@ -905,4 +910,4 @@ ev_document_check_add_night_sheet(EvDocument *document)
 {
 	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS(document);
 	return klass->check_add_night_sheet(document) ;
-}
\ No newline at end of file
+}