[dia] xfig-import: don't create a group for a single object

[Hans Breuer <hans src gnome org>]

commit b25a1dc8a52e10311142c6857c4869b9cb493449
Author: Hans Breuer <hans breuer org>
Date:   Fri Sep 5 16:14:46 2014 +0200

    xfig-import: don't create a group for a single object
    
    it's just superfluous and annoying during round-trip.

 plug-ins/xfig/xfig-import.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/plug-ins/xfig/xfig-import.c b/plug-ins/xfig/xfig-import.c
index 85784b4..9c31c9a 100644
--- a/plug-ins/xfig/xfig-import.c
+++ b/plug-ins/xfig/xfig-import.c
@@ -1042,7 +1042,10 @@ fig_read_object(FILE *file, DiaContext *ctx)
        }
 
        /* Make group item with these items */
-       item = create_standard_group((GList*)compound_stack->data);
+       if (g_list_length((GList*)compound_stack->data) > 1)
+           item = create_standard_group((GList*)compound_stack->data);
+       else /* a single item needs no group */
+           item = (DiaObject *)((GList*)compound_stack->data)->data;
        compound_stack = g_slist_remove(compound_stack, compound_stack->data);
        if (compound_stack == NULL) {
            depths[compound_depth] = g_list_append(depths[compound_depth],