Fixed initial layout bug when using dynamically created bitmap on wxGTK

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54689 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/wizard.cpp

@@ -945,6 +945,9 @@ bool wxWizard::DoLayoutAdaptation()
 
     wxStandardDialogLayoutAdapter::DoFitWithScrolling(this, windows);
 
+    // Size event doesn't get sent soon enough on wxGTK
+    DoLayout();
+    
     SetLayoutAdaptationDone(true);
 
     return true;