[Bug] Erase tool (v1.2.0)

[TechMorgan]

• [x] I have given my bug report a descriptive title, beginning with "[Bug]" and ending with the version code for FreePaint in brackets.
• [x] My issue describes only one bug, and does not contain multiple bugs or feature requests.
• [x] I have attached all assets to be able to reproduce this bug.
• [ ] (if available): This bug is reproducable on a virtual machine or device running stock Android.

Description: When I erase a line, and then touch once, the app crashes.

Device:

• OS/version: Oxygen OS (Android 13)
• Device: OnePlus Nord CE 3

https://github.com/pastthepixels/FreePaint/assets/83485038/8ae766b5-79d6-42fe-b42c-6279ee469c58