[dia] Bug 436148 - More robustness parsing FIG header

[Hans Breuer <hans src gnome org>]

commit 7cebf3c2e7d371dfd10d18f700e75dcef09c0367
Author: Hans Breuer <hans breuer org>
Date:   Sun Jan 30 21:48:08 2011 +0100

    Bug 436148 - More robustness parsing FIG header

 plug-ins/xfig/xfig-import.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/plug-ins/xfig/xfig-import.c b/plug-ins/xfig/xfig-import.c
index 59a9392..1436b27 100644
--- a/plug-ins/xfig/xfig-import.c
+++ b/plug-ins/xfig/xfig-import.c
@@ -1255,6 +1255,7 @@ fig_read_meta_data(FILE *file, DiagramData *dia) {
 gboolean 
 import_fig(const gchar *filename, DiagramData *dia, void* user_data) {
     FILE *figfile;
+    char buf[BUFLEN];
     int figmajor, figminor;	
     int i;
 
@@ -1273,7 +1274,8 @@ import_fig(const gchar *filename, DiagramData *dia, void* user_data) {
     }
   
     /* First check magic bytes */
-    if (fscanf(figfile, "#FIG %d.%d\n", &figmajor, &figminor) != 2) {
+    if (fgets(buf, BUFLEN, figfile) == NULL ||
+        sscanf(buf, "#FIG %d.%d\n", &figmajor, &figminor) != 2) {
 	message_error(_("Doesn't look like a Fig file: %s\n"), strerror(errno));
 	fclose(figfile);
 	return FALSE;