Issue

With 1C Russian localization, texts with letter 'ю'(0xFE) are displayed incorrectly or not displayed at all.

This issue has already been reported #157

Solution

Argument of function FMtext_char_width(char c) is (signed) char, so line:
width = gCurrentFont->glyphs[c].width;
may lead to accessing the wrong memory cell.
Casting the 'c' variable to a unsigned char type(, like in FMtext_width,) solves this problem.