avoid ambiguity error in lmul! with Q and layout vectors/matrices

[dlfivefifty]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.91%. Comparing base (62e8561) to head (1c1fbe3).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #484      +/-   ##
==========================================
+ Coverage   89.80%   89.91%   +0.11%     
==========================================
  Files          27       27              
  Lines        3719     3720       +1     
==========================================
+ Hits         3340     3345       +5     
+ Misses        379      375       -4     

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