backported wxArtProvider::PushBack() to 2.8 so that one can write code compatible with both wx2.8 and wx3

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@57701 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/artprov.h

@@ -122,6 +122,10 @@ public:
 
     // Add new provider to the bottom of providers stack (i.e. the provider
     // will be queried as the last one).
+#if wxABI_VERSION >= 20810
+    static void PushBack(wxArtProvider *provider);
+#endif
+    // same as PushBack()
     static void Insert(wxArtProvider *provider);
 
     // Remove latest added provider and delete it.

src/common/artprov.cpp

@@ -139,6 +139,11 @@ wxArtProvider::~wxArtProvider()
     sm_providers->Append(provider);
 }
 
+/*static*/ void wxArtProvider::PushBack(wxArtProvider *provider)
+{
+    Insert(provider);
+}
+
 /*static*/ bool wxArtProvider::Pop()
 {
     wxCHECK_MSG( sm_providers, false, _T("no wxArtProvider exists") );

version-script.in

@@ -25,6 +25,7 @@
 
 # public symbols added in 2.8.10 (please keep in alphabetical order):
 @WX_VERSION_TAG@.10 {
+        *wxArtProvider*PushBack*;
         *wxCArrayString*Release*;
         *wxDCBase*GetFontPointSizeAdjustment*;
         *wxWindowBase*DragAcceptFiles*;