Added XSync before mapping but this doesn't seem enough to get

the popup window to show before the capture (which fails if not
mapped)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14162 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/x11/window.cpp

@@ -269,6 +269,7 @@ bool wxWindowX11::Show(bool show)
 	msg.Printf("Mapping window of type %s", GetClassInfo()->GetClassName());
 	wxLogDebug(msg);
         XMapWindow(xdisp, xwin);
+	XSync(xdisp, False);
     }
     else
     {