Forcefully show variable as used

[mbarbar]

We were seeing count being regarded as unused by the compiler on some systems.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.45%. Comparing base (5c45081) to head (d130390).
⚠️ Report is 10 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1835   +/-   ##
=======================================
  Coverage   64.44%   64.45%           
=======================================
  Files         252      252           
  Lines       25208    25210    +2     
  Branches     4768     4768           
=======================================
+ Hits        16246    16248    +2     
  Misses       8962     8962           

Files with missing lines	Coverage Δ
svf/lib/DDA/DDAClient.cpp	14.89% <ø> (ø)

... and 9 files with indirect coverage changes

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