update copyconstructor

include/PacketStructureJson.h

@@ -27,7 +27,7 @@ public:
 		updateStructure(this->source);
 	}
 
-	PacketStructureJson(PacketStructureJson &other) : BasePacketStructure(other){
+	PacketStructureJson(const BasePacketStructure &other) : BasePacketStructure(other){
 	}
 };
 }