Fix some compiler errors and a mistake in config.cpp.

debug.cpp

@@ -447,7 +447,7 @@ struct debugScreen {
     dialog::addBack();
     dialog::display();
 
-    keyhandler = [this, what] (int sym, int uni) {
+    keyhandler = [this] (int sym, int uni) {
       handlePanning(sym, uni);
       dialog::handleNavigation(sym, uni);
       if(applyCheat(uni)) ;