Horizontal Bezier mode issue when first value positive but others are `0`

## What did you do?
I need to display history data with **.horizontalBezier** mode to have smooth lines.

## What did you expect to happen?
In case when first value is positive, but others are `0` it looks this way:

I excepted that curved line should go through all the points.

## What happened instead?
Curved line doesn't go through the second point for some reason.

## Charts Environment

**Charts version/Branch/Commit Number:**
PODS:
- Charts (3.2.2):
- Charts/Core (= 3.2.2)
- Charts/Core (3.2.2)

**Xcode version:** Version 10.2 (10E125)
**Swift version:** 5.0
**Platform(s) running Charts:** iOS
**macOS version running Xcode:** 10.14.4 (18E226)

## Demo Project
https://www.dropbox.com/s/gqf1qsu0k61mlld/ChartsHorizontalBezierIssue.zip?dl=0