Directory: Close files on copy() failure

[Squareys]

Hi @mosra !

As mentioned per gitter :)

Cheers, Jonathan.

[codecov-io]

Codecov Report

Merging #70 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #70      +/-   ##
==========================================
+ Coverage   97.61%   97.61%   +<.01%     
==========================================
  Files          80       80              
  Lines        5455     5457       +2     
==========================================
+ Hits         5325     5327       +2     
  Misses        130      130

Impacted Files	Coverage Δ
src/Corrade/Utility/Directory.cpp	88.54% <100%> (+0.08%)	⬆️

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[codecov-io]

Codecov Report

Merging #70 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #70      +/-   ##
==========================================
+ Coverage   97.61%   97.61%   +<.01%     
==========================================
  Files          80       80              
  Lines        5455     5457       +2     
==========================================
+ Hits         5325     5327       +2     
  Misses        130      130

Impacted Files	Coverage Δ
src/Corrade/Utility/Directory.cpp	88.54% <100%> (+0.08%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 85f9ee0...8ec07db. Read the comment docs.

[mosra]

I fixed this in 132fd6f by moving the scope guards up. Less code generated :)

(well, I hope that doesn't miss anything obvious compared to your patch)

[Squareys]

@mosra Looks great! Just the 2015 copyright year in the header is a little confusing ;)

[mosra]

argh! bad, copypaste, bad 🙈