Fix test

Reason: When shifting to the left, but the number of bits is not 64, the shift will not shift enough so bits of the next byte might be also in v. With this masking they can be removed

Author: Murmele

src/message.cpp

@@ -66,8 +66,10 @@ Message::ParseSignalsStatus Message::parseSignals(const std::vector<uint8_t>& da
 				break;
 			}
 			}
-		} else
-			values.push_back(v * signal.factor + signal.offset);
+		} else {
+			// use only the relevant bits
+			values.push_back((v & ((1 << signal.size) - 1)) * signal.factor + signal.offset);
+		}
 	}
 	return ParseSignalsStatus::Success;
 }