Fixed Issue 1928

Fixed Issue 1917
(Since wxWidgets is not allowed in core, so I moved the popup window to CFrame)

*Maybe* this could also fix Issue 1919?

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4780 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_nJoy_SDL/Src/nJoy.cpp

@@ -253,6 +253,7 @@ void Shutdown()
 
 	// Remove the pointer to the initialize data
 	g_PADInitialize = NULL;
+	g_SearchDeviceDone = false;
 }