=== modified file 'src/extension/param/color.cpp'
--- src/extension/param/color.cpp	2014-10-11 17:05:39 +0000
+++ src/extension/param/color.cpp	2015-09-29 02:25:48 +0000
@@ -91,7 +91,9 @@
 {
     if (_gui_hidden) return NULL;
 
-    _changeSignal = new sigc::signal<void>(*changeSignal);
+    if (changeSignal) {
+        _changeSignal = new sigc::signal<void>(*changeSignal);
+    }
     Gtk::HBox * hbox = Gtk::manage(new Gtk::HBox(false, 4));
     SPColorSelector* spColorSelector = (SPColorSelector*)sp_color_selector_new(SP_TYPE_COLOR_NOTEBOOK);