Corrected XPM-related cast in resource.cpp; added generic Blitting code in wxPostScriptDC

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1598 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/resource.cpp

@@ -2173,7 +2173,7 @@ wxBitmap wxResourceCreateBitmap(const wxString& resource, wxResourceTable *table
                          "Forgot to use wxResourceLoadBitmapData?"), (const char*) name);
           return wxNullBitmap;
         }
-        return wxBitmap((const char **)item->GetValue1());
+        return wxBitmap((char **)item->GetValue1());
 #else
         wxLogWarning(_("No XPM facility available!"));
 #endif