don't use annoying and unneeded in C++ casts of NULL to "T *" in all other files neither

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58227 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/wizard.cpp

@@ -289,7 +289,7 @@ wxSize wxWizardSizer::SiblingSize(wxSizerItem *child)
 void wxWizard::Init()
 {
     m_posWizard = wxDefaultPosition;
-    m_page = (wxWizardPage *)NULL;
+    m_page = NULL;
     m_btnPrev = m_btnNext = NULL;
     m_statbmp = NULL;
     m_sizerBmpAndPage = NULL;