Correct wxInfoBar::ShowMessage() flags argument documentation.

The default value is wxICON_INFORMATION, not wxICON_NONE.

Closes #16861.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@78486 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/infobar.h

@@ -179,7 +179,7 @@ public:
             parameter to select the appropriate background colour for the
             notification.
      */
-    void ShowMessage(const wxString& msg, int flags = wxICON_NONE);
+    void ShowMessage(const wxString& msg, int flags = wxICON_INFORMATION);
 
     /**
         @name Generic version customization methods.