actually use --devdir argument

src/layout.cpp

@@ -308,7 +308,6 @@ void LayoutManager::fillPopup() {
 
 void LayoutManager::updateJoyDevs() {
     debug_mesg("updating joydevs\n");
-    QString devdir = DEVDIR;
 
     //reset all joydevs to sentinal value (-1)
     foreach (JoyPad *joypad, joypads) {

src/layout.h

@@ -34,6 +34,8 @@
 //where QJoyPad saves its settings!
 const QString settingsDir(QDir::homePath() + "/.qjoypad3/");
 
+extern QString devdir;
+
 //handles loading, saving, and changing of layouts
 class LayoutManager : public QObject {
 	friend class LayoutEdit;