LabelSelect_Batch stream output type

[Yaman Umuroglu]

In the LabelSelect_Batch op I see that the Out_T is templated probably to allow using smaller output bandwidth (e.g. 16-bit ints enough to represent 1000 classes) which is good, but the actual output dtype from the layer seems to be 32 bits always:

template<
		// tensor size parameters
		unsigned int NumClasses,
		unsigned int PECount,
    unsigned int NumTop,
		typename In_T,
    typename Out_T>
void LabelSelect_Batch(stream<ap_uint<PECount * In_T::width> > & in,
		stream<ap_uint<32> > & out, const unsigned int numReps) {

and the output isn't packed but written directly to the output stream

    for(unsigned int topx = 0; topx < NumTop; topx++){
            out.write(toplabels[NumTop - topx - 1]);
    }

Would it make sense to change the output stream type to stream<Out_T>? or is there some special reason we cast it to 32 bit uint first?

[giuliogamba]

Fixed with PR #26