Resolve some compile errors and warnings that can arise under Linux

communication/message/include/neomessage.h

@@ -2,6 +2,7 @@
 #define __NEOMESSAGE_H_
 
 #include <stdint.h>
+#include <stddef.h>
 
 typedef struct {
 	uint16_t netid;

communication/message/neomessage.cpp

@@ -18,6 +18,9 @@ neomessage_t icsneo::CreateNeoMessage(const Message& message) {
 		case Network::Type::CAN:
 			((neomessage_can_t*)&neomsg)->arbid = ((const CANMessage*)&message)->arbid;
 			break;
+		default:
+			// TODO Implement others
+			break;
 	}
 
 	return neomsg;