Issue with Unicode input on GuiTextBox()

[electrolys]

gui textbox doesn't handle adding and removing characters properly and causes an underflow (at adding) and overflow (at removal)

at lines

raygui/src/raygui.h

Line 2582 in 6f53233

for (int i = (textBoxCursorIndex - prevCodepointSize); i < textLength; i++) text[i] = text[i + prevCodepointSize];

https://github.com/raysan5/raygui/blob/6f532337ff2d6dc14ba3a5f5b7ee63f9d90ff13b/src/raygui.h#L2562C21-L2562C113

you are just comparing the variable i with the text length or cursor when you really need to >= cursor+codepointsize and <= length-codepointsize

[raysan5]

@electrolys Good catch! Please, could you send a PR with the fix! Thanks!