+ fix build errors

git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5201 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d

src/Gui/DownloadDialog.cpp

@@ -23,6 +23,8 @@
 
 #include "PreCompiled.h"
 #ifndef _PreComp_
+# include <QPushButton>
+# include <QHBoxLayout>
 #endif
 
 #include "DownloadDialog.h"

src/Gui/DownloadDialog.h

@@ -30,12 +30,15 @@
 #include <QBuffer>
 #include <QLabel>
 #include <QProgressBar>
-#include <QProgressDialog>
 #include <QHttp>
 #include <QFileInfo>
 #include <QCloseEvent>
 #include <QDialogButtonBox>
 
+class QFile;
+class QHttpResponseHeader;
+class QAuthenticator;
+
 namespace Gui {
 namespace Dialog {