[dia] [warningectomy] expression result unused

[Hans Breuer <hans src gnome org>]

commit cf32fccb746aa4db4d19895ce3e2a74e3f98b282
Author: Hans Breuer <hans breuer org>
Date:   Sat Apr 5 22:00:14 2014 +0200

    [warningectomy] expression result unused

 plug-ins/wmf/wmf.cpp |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/plug-ins/wmf/wmf.cpp b/plug-ins/wmf/wmf.cpp
index cc55892..ff752a9 100644
--- a/plug-ins/wmf/wmf.cpp
+++ b/plug-ins/wmf/wmf.cpp
@@ -235,8 +235,9 @@ DonePen(WmfRenderer* renderer, W32::HPEN hPen)
     }
 }
 
+static void _nada(WmfRenderer*, const char*, ...) { }
 #ifndef HAVE_LIBEMF
-#  define DIAG_NOTE /* my_log */
+#  define DIAG_NOTE _nada
 #else
 #  define DIAG_NOTE my_log
 #endif