Bug in printf function

[VVWVV]

The function does not correctly format the width option.

Example:

printf("%5d", -1);

Output:

-    1

Here the example how it must be formatted:

    -1

This bug works when the function prepends zeros.

[Y-Less]

There are a few bugs in printf:

printf("%d", cellmin);
printf("%x", -1);

I can't remember the rest. I did write a fixed version, but there is no good way that I could think of to fix it remotely efficiently.