Make sure width is a string before using match()

[dpvc]

This fixes the issue you were having that we talked about in meeting last week.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 86.49%. Comparing base (685a53b) to head (a5f845b).

Files with missing lines	Patch %	Lines
ts/output/common/Wrappers/mpadded.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop    #1394     +/-   ##
==========================================
  Coverage    86.49%   86.49%             
==========================================
  Files          340      340             
  Lines        85813    85813             
  Branches      4815     3177   -1638     
==========================================
  Hits         74220    74220             
  Misses       11593    11593             

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