Resolve "Decoder crash for MC 5.1 at 192kbps JBM error profile 6"

• Related issues: #1215 (closed)
• Requested reviewers:

Reason why this change is needed

• Assert hit in decoder, see #1215 (closed)

Description of the change

• Limit maxScaling in the playout adaption part of the JBM to a sensible range of values. This avoids integer overflows when converting maxScaling from milliseconds to samples.

Affected operating points

• Encoder: Produced bitstream is BE compared to previous state.
• Decoder:
  • BE in non-VoIP mode.
  • In VoIP mode non-BE may occur only in very specific cases where an integer overflow occurred but the resulting value happened not to trigger the assert described in #1215 (closed).

Related to #1215 (closed)