Optional parameters are SCM_UNDEFINED

[guile-irrlicht.git] / src / gui-in-out-fader.cpp

diff --git a/src/gui-in-out-fader.cpp b/src/gui-in-out-fader.cpp
index fb8a9e3b512fd539ea858890c429ce71a3576b0b..41dfc3fcca12cdbed85e40cc029d87a75cb03bd9 100644 (file)
--- a/src/gui-in-out-fader.cpp
+++ b/src/gui-in-out-fader.cpp
@@ -44,7 +44,7 @@ extern "C" {
                                    SCM dest_color)
   {
     irr::gui::IGUIInOutFader* fader = unwrap_gui_in_out_fader (wrapped_in_out_fader);
-    if (scm_is_false (dest_color))
+    if (dest_color == SCM_UNDEFINED)
       {
         fader->setColor (scm_to_color (color));
       }