bug recently introduced in wxWizard::GetPageSize() fixed

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7323 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/wizard.cpp

@@ -315,6 +315,10 @@ wxWizardPage *wxWizard::GetCurrentPage() const
 
 wxSize wxWizard::GetPageSize() const
 {
+    // make sure that the controls are created because otherwise m_width and
+    // m_height would be both still -1
+    DoCreateControls();
+
     return wxSize(m_width, m_height);
 }