proto messages with repeated fields of enum-types are not serialized correctly.

We had to replace all such occurrences with repeated int32 fields in order to to get correct binary data.

Example proto-file repeatedenums.proto:

package qtbugs;

enum TestEnum {
    One = 1;
    Two = 2;
    Three = 3;
}

message TestMessage {
    repeated TestEnum state = 1;
}

Example program:

The following sample program will write the binary data to a file:

    QProtobufSerializer serializer;
    qtbugs::TestMessage message;
    message.state().append(qtbugs::TestEnumGadget::One);
    message.state().append(qtbugs::TestEnumGadget::Two);
    message.state().append(qtbugs::TestEnumGadget::Three);
    QByteArray rawData = message.serialize(&serializer);
    qInfo() << rawData;
    QFile file{"testmessage.protobuf"};
    file.open(QIODevice::WriteOnly);
    file.write(rawData);

Expected output as obtained via "protoc --decode_raw < testmessage.protobuf":

1: 1
1: 2
1: 3

Actual output as obtained via "protoc --decode_raw < testmessage.protobuf":

1: "\000\001\002"