Generated SourceAPI class can't be used without compiler warnings

When generating code for a replica source, it also generates a SourceAPI template class.

Trying to use this template class can result in compiler warnings and by that can't compile with -Werror.

This only happens if no methods or no signals are provided in the rep file.

The generated code contains the following function:

QByteArrayList methodParameterNames(int index) const override
    {
        if (index < 0 || index >= m_methods[0])
            return QByteArrayList();
        return ObjectType::staticMetaObject.method(m_methods[index + 1]).parameterNames();
    }

...

int m_methods[1];

and results in the following warning:

warning: array subscript 1 is above array bounds of ‘const int [1]’ [-Warray-bounds]