fix building when not setting macro UNDO

1 files changed, 4 insertions, 1 deletions

diff --git a/src/gram.y b/src/gram.y
index a1b06a1..873417b 100755
--- a/src/gram.y
+++ b/src/gram.y
@@ -768,17 +768,20 @@ command:
     |    S_PRINT_GRAPH             { print_vertexs(); }
     |    S_SYNCREFS                { sync_refs(); }
     |    S_UNDO                    {
+#ifdef UNDO
                                      do_undo();
                                      // sync_refs();
                                      EvalAll();
                                      ui_update(TRUE);
+#endif
                                    }
-
     |    S_REDO                    {
+#ifdef UNDO
                                      do_redo();
                                      // sync_refs();
                                      EvalAll();
                                      ui_update(TRUE);
+#endif
                                    }
 
 // For scripting and piping