Send wxInitDialogEvent under wxMotif.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35581 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/motif/dialog.cpp

@@ -293,6 +293,14 @@ bool wxDialog::Show( bool show )
 
     m_isShown = show;
 
+    if (show)
+    {
+        // this usually will result in TransferDataToWindow() being called
+        // which will change the controls values so do it before showing as
+        // otherwise we could have some flicker
+        InitDialog();
+    }
+
     if (show)
     {
         if (!wxUSE_INVISIBLE_RESIZE)