Removed wxPGProperty:GetArrIndex() in favor of GetIndexInParent()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55879 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/propgrid/property.cpp

@@ -1953,7 +1953,7 @@ void wxPGProperty::PrepareSubProperties()
 
             depth--;
 
-            i = nparent->GetArrIndex() + 1;
+            i = nparent->GetIndexInParent() + 1;
             nparent = nparent->GetParent();
         }
     }