Fixed null-reference-exception when parsing empty scope-property collection

[snakefoot]

Fixed bug introduced with #232

[codecov]

Codecov Report

Merging #233 into master will decrease coverage by 1.2%.
The diff coverage is 6.66%.

@@            Coverage Diff             @@
##           master     #233      +/-   ##
==========================================
- Coverage   71.82%   70.61%   -1.21%     
==========================================
  Files           7        7              
  Lines         433      439       +6     
  Branches      106      108       +2     
==========================================
- Hits          311      310       -1     
- Misses         80       87       +7     
  Partials       42       42

Impacted Files	Coverage Δ
src/NLog.Extensions.Logging/Logging/NLogLogger.cs	77.45% <ø> (ø)	⬆️
...og.Extensions.Logging/Logging/NLogLoggerFactory.cs	0% <0%> (ø)	⬆️
...g.Extensions.Logging/Logging/NLogLoggerProvider.cs	75% <0%> (-7.5%)	⬇️
...Extensions.Logging/Logging/NLogBeginScopeParser.cs	67.34% <20%> (+0.34%)	⬆️

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[304NotModified]

enhancement, because the bug was never released

[304NotModified]

I did recognize some changes as a result of Sonar(lint) ;)

Thanks!

[snakefoot]

@304NotModified I did recognize some changes as a result of Sonar :)

Yes like code analysis tools. Though not always code complexity analysis tools :)