make XPM data pointer parameter fully const

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51211 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/icon.cpp

@@ -24,15 +24,17 @@
 
 IMPLEMENT_DYNAMIC_CLASS(wxIcon, wxBitmap)
 
-wxIcon::wxIcon( const char **bits, int WXUNUSED(width), int WXUNUSED(height) ) :
+wxIcon::wxIcon(const char* const* bits) :
     wxBitmap( bits )
 {
 }
 
-wxIcon::wxIcon( char **bits, int WXUNUSED(width), int WXUNUSED(height) ) :
+#ifdef wxNEEDS_CHARPP
+wxIcon::wxIcon(char **bits) :
     wxBitmap( bits )
 {
 }
+#endif
 
 wxIcon::wxIcon() :  wxBitmap()
 {