wxwidgets: exit-fullscreen to forcibly exit fullscreen mode

src/platform/wxwidgets/mainwindow.cpp

@@ -1886,3 +1886,16 @@ void wxwin_mainwindow::enter_or_leave_fullscreen(bool fs)
 		request_paint();	//Don't leave graphical corruption.
 	}
 }
+
+namespace
+{
+	struct command::stub _exit_fullscreen = {"exit-fullscreen", "Exit fullscreen",
+		"Syntax: exit_fullscreen\nExit fullscreen"};
+	command::fnptr<> exit_fullscreen(lsnes_cmds, _exit_fullscreen,
+		[]() throw(std::bad_alloc, std::runtime_error) {
+			runuifun([]() {
+				if(is_fs)
+					main_window->enter_or_leave_fullscreen(false);
+			});
+		});
+}