(svn r26544) [1.4] -Backport from trunk:

- Fix: [Windows] Crash when the operating system performs the "paint" callback during window creation [FS#5994] (r26539, r26538)
- Fix: OpenBSD compilation [FS#5992] (r26523)
- Fix: prevent from ever reading huge (or negative) amounts of data in strgen (r26521)
- Fix: Severity rating of dedicated server messages during world generation (r26518)

src/osk_gui.cpp

@@ -206,7 +206,7 @@ struct OskWindow : public Window {
 
 	virtual void OnFocusLost()
 	{
-		_video_driver->EditBoxLostFocus();
+		VideoDriver::GetInstance()->EditBoxLostFocus();
 		delete this;
 	}
 };