Draws justified text within a region.


void textout_justify_ex(BITMAP *bmp, const FONT *f, const char *s, int x1, int x2, int y, int diff, int color, int bg);
Draws justified text within the region x1-x2. If the amount of spare space is greater than the diff value, it will give up and draw regular left justified text instead. Example:
      char *lines[] = {"Draws justified text",
		       "within the specified",
		       "x2-x1 area. But not",
		       "T H I S !", NULL};
      /* Show the justification marker. */
      vline(screen, 200, 0, SCREEN_H-1, makecol(0, 0, 0));
      /* Draw all the lines until we reach a NULL entry. */
      for (num = 0, y = 0; lines[num]; num++, y += text_height(font))
	 textout_justify_ex(screen, font, lines[num], 0, 200,
			    y, 80, makecol(0, 0, 0),
			    makecol(255, 255, 255));

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