fix protocol functions with arguments

It invoking functions that take arguments via the protocol was temporarily broken. Such functions were invoked with undefined arguments (usually 0).

Firmware/communication/protocol.hpp

@@ -812,6 +812,18 @@ public:
         LOG_PROTO("my tuple is at %x and of size %u\r\n", (uintptr_t)&in_args_, sizeof(in_args_));
     }
 
+    // The custom copy constructor is needed because otherwise the
+    // input_properties_ and output_properties_ would point to memory
+    // locations of the old object.
+    ProtocolFunction(const ProtocolFunction& other) :
+        name_(other.name_), obj_(other.obj_), func_ptr_(other.func_ptr_),
+        input_names_{other.input_names_}, output_names_{other.output_names_},
+        input_properties_(PropertyListFactory<TInputs...>::template make_property_list<0>(input_names_, in_args_)),
+        output_properties_(PropertyListFactory<TOutputs...>::template make_property_list<0>(output_names_, out_args_))
+    {
+        LOG_PROTO("COPIED! my tuple is at %x and of size %u\r\n", (uintptr_t)&in_args_, sizeof(in_args_));
+    }
+
     void write_json(size_t id, StreamSink* output) {
         // write name
         write_string("{\"name\":\"", output);