[FIX] Network file: Output valid table when file with data does not match

[janezd]

Issue

Fixes #160.

Description of changes

When data table exists, but its length does not match the number of vertices, it was not used, but the node labels were not converted from ndarray to Table.

Because of mis-indented break. :)

Includes

• Code changes
• Tests

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.48%. Comparing base (247b3d8) to head (08a07bd).
⚠️ Report is 176 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #185      +/-   ##
==========================================
+ Coverage   75.23%   75.48%   +0.25%     
==========================================
  Files          21       21              
  Lines        2790     2790              
==========================================
+ Hits         2099     2106       +7     
+ Misses        691      684       -7     

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