Ignore deprecated warning on Mac

src/gui/src/MainWindow.cpp

@@ -946,7 +946,10 @@ void MainWindow::setVisible(bool visible)
 #if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 // lion
     // dock hide only supported on lion :(
     ProcessSerialNumber psn = { 0, kCurrentProcess };
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
     GetCurrentProcess(&psn);
+#pragma GCC diagnostic pop
     if (visible)
         TransformProcessType(&psn, kProcessTransformToForegroundApplication);
     else