rem: fprintf (stderr, "Character %u not present\n");
add: fprintf (stderr, "Character %u not present\n", ch);
context: getCharFrame (FONT_DESC *fontPtr, wchar_t ch){	wchar_t pageStart = ch & CHARACTER_PAGE_MASK;	size_t charIndex;	FONT_PAGE *page = fontPtr->fontPages;	for (;;)	{		if (page == NULL)			return NULL;		if (page->pageStart == pageStart)			break;		page = page->next;	}	charIndex = ch - page->firstChar;	if (ch >= page->firstChar && charIndex < page->numChars			&& page->charDesc[charIndex].image)	{		return &page->charDesc[charIndex];	}	else	{#ifdef DEBUG		fprintf (stderr, "Character %u not present\n");#endif		return NULL;	}}