fix MIS x86 SubspaceMap Int64 instead of Int bug

[kaihsin]

No description provided.

[codecov]

Codecov Report

Merging #597 (aa4f7c9) into master (f223ae4) will not change coverage.
Report is 5 commits behind head on master.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #597   +/-   ##
=======================================
  Coverage   75.16%   75.16%           
=======================================
  Files          94       94           
  Lines        4438     4438           
=======================================
  Hits         3336     3336           
  Misses       1102     1102           

Files Changed	Coverage Δ
lib/BloqadeMIS/src/loss.jl	95.03% <100.00%> (ø)

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[Roger-luo]

I think this should be good, perhaps double check if tests are using Int over Int64 as well