avm2: Handle negative `TextField.scrollH` properly #26957

Job	Run time
Paths filter	5s
Check dependencies	1m 26s
Lints with Rust stable	3m 52s
Lints with Rust beta	3m 56s
Test Rust stable / ubuntu-24.04	4m 34s
Lints with Rust nightly	4m 6s
Test Rust ${{ matrix.rust_version }} / ${{ matrix.os }}	0s
Test Rust stable / windows-latest	10m 26s
Test Rust stable / macos-14	3m 6s
Test Rust nightly / ubuntu-24.04	4m 31s
Test Rust beta / ubuntu-24.04	4m 31s
	40m 33s

Provide feedback