Fix for zero bytes files

[StefH]

No description provided.

[codecov-commenter]

Codecov Report

Merging #3 into master will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master       #3      +/-   ##
==========================================
+ Coverage   95.41%   95.43%   +0.01%     
==========================================
  Files           2        2              
  Lines         786      788       +2     
  Branches       15       16       +1     
==========================================
+ Hits          750      752       +2     
  Misses         29       29              
  Partials        7        7              

Impacted Files	Coverage Δ
.../Pulumi.Azure.Extensions/Storage/BlobCollection.cs	76.78% <100.00%> (+0.85%)	⬆️

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