Fix legend offset bug for horizontal bar chart (Fixes #3301)

[SvenMuc]

Issue Link 🔗

Horizontal Bar Chart legend issue #3301

Goals ⚽

This PR fixes the legend offset issue in case of horizontal bar charts.

Implementation Details 🚧

The guard conditions in the method calculateLegendOffsets in the file HorizontalBarChartView.swift were wrong.

Testing Details 🔍

Tested in own app.

[codecov-io]

Codecov Report

Merging #3736 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master    #3736   +/-   ##
=======================================
  Coverage   32.67%   32.67%           
=======================================
  Files         114      114           
  Lines       10754    10754           
=======================================
  Hits         3514     3514           
  Misses       7240     7240

Impacted Files	Coverage Δ
Source/Charts/Charts/HorizontalBarChartView.swift	0% <0%> (ø)	⬆️

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[liuxuan30]

Thanks!