Don't let the function change the dollop target itself when retargeting a callback.

include/zipr_plugin.h

@@ -63,7 +63,7 @@ class ZiprPluginInterface_t
 		{
 			return None;
 		}
-		virtual ZiprPreference RetargetCallback(const RangeAddress_t &, Zipr_SDK::DollopEntry_t *, RangeAddress_t &)
+		virtual ZiprPreference RetargetCallback(const RangeAddress_t &, const Zipr_SDK::DollopEntry_t *, RangeAddress_t &)
 		{
 			return None;
 		}