[core] Touches do not release at the correct time

[tromero]

When two fingers are pressed, the second finger release does not occur until another touch event happens later.

Issue description

Run the "Input multitouch" example on the web on iOS Safari:
https://www.raylib.com/examples/core/loader.html?name=core_input_multitouch

Press and hold with one finger, and be sure not to move it
Press and release with another finger
The second touch point will not disappear!

Move or release the first finger
The stale touch point will finally be removed

Environment

iOS Safari

Code Example

core_input_multitouch example project https://github.com/raysan5/raylib/blob/master/examples/core/core_input_multitouch.c

[tromero]

Works great, thanks for the quick fix!