Crash when there's more than 8 touches

[BUGO07]

12-13 13:28:11.510 32446 32479 I RustStdoutStderr: thread '' panicked at /home/bugo07/.cargo/registry/src/index.crates.io-6f17d22bba15001f/android-activity-0.6.0/src/game_activity/input.rs:136:13:
12-13 13:28:11.510 32446 32479 I RustStdoutStderr: Pointer index 8 is out of bounds
12-13 13:28:11.510 32446 32479 I RustStdoutStderr: note: run with RUST_BACKTRACE=1 environment variable to display a backtrace