This function is like ustrzcpy() except that no more than `n' characters from `src' are copied into
`dest' whose length in bytes is specified by `size' and which is guaranteed to be null-terminated even if
`src' is bigger than `size'. If `src' is shorter than `n' characters, null characters are appended to
`dest' as padding until `n' characters have been written. In any case, `dest' is guaranteed to be null-
terminated.
Note that, even for empty strings, your destination string must have at least enough bytes to store the
terminating null character of the string, and your parameter `size' must reflect this. Otherwise, the
debug version of Allegro will abort at an assertion, and the release version of Allegro will overrun the
destination buffer.