fix: bug when fit_intercept=False, support.size=0

[bbayukari]

No description provided.

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (5c62b52) 97.74% compared to head (5130593) 97.74%.
Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #520   +/-   ##
=======================================
  Coverage   97.74%   97.74%           
=======================================
  Files           7        7           
  Lines         977      977           
=======================================
  Hits          955      955           
  Misses         22       22           

Flag	Coverage Δ
Python	97.74% <100.00%> (ø)

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Files Changed	Coverage Δ
python/abess/datasets.py	100.00% <100.00%> (ø)

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