Multi-monitor support (backend preparation part)

src/qt/qt_mainwindow.cpp

@@ -119,7 +119,7 @@ static BMessageFilter* filter;
 #endif
 
 extern void qt_mouse_capture(int);
-extern "C" void qt_blit(int x, int y, int w, int h);
+extern "C" void qt_blit(int x, int y, int w, int h, int monitor_index);
 
 MainWindow::MainWindow(QWidget *parent) :
     QMainWindow(parent),

src/qt/qt_ui.cpp

@@ -55,7 +55,7 @@ wchar_t* ui_window_title(wchar_t* str)
     return str;
 }
 
-extern "C" void qt_blit(int x, int y, int w, int h)
+extern "C" void qt_blit(int x, int y, int w, int h, int monitor_index)
 {
     main_window->blitToWidget(x, y, w, h);
 }