Serializer computes count width 0 when only 1 element in deserialized

[mkorbel1]

Describe the bug

If a single element is passed into a Serializer (i.e. deserialized is a 1D array with 1 element), then the width of count is determined to be 0, which then breaks the assignment to the output of the Counter since it always has at least 1 bit.

To Reproduce

Create a Serializer with a 1D array with 1 element in it passed in.

Expected behavior

The Serializer should always have 1-bit output on count probably, or at least it should build properly and drive outputs in a way that makes sense.

Actual behavior

Signal count has the wrong width. Expected 0 but found 1.

Additional: Dart SDK info

No response

Additional: pubspec.yaml

Additional: Context

No response