Cast result to the proper result type

[mborland]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.79%. Comparing base (5b191b0) to head (dbd4281).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #153   +/-   ##
========================================
  Coverage    95.79%   95.79%           
========================================
  Files          117      117           
  Lines         7664     7664           
========================================
  Hits          7342     7342           
  Misses         322      322           

Files with missing lines	Coverage Δ
include/boost/random/uniform_int_distribution.hpp	97.14% <100.00%> (ø)

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