Certain pcf font gets wrong metrics

[jepler]

I ran into a problem where, after bdf conversion, the font has the wrong bounding box. This leads to bad stuff happening in multiline labels.

>>> f1 = adafruit_bitmap_font.bitmap_font.load_font("/5x8.pcf")
>>> f2 = adafruit_bitmap_font.bitmap_font.load_font("/5x8.bdf")
>>> f2.get_bounding_box()
(5, 8, 0, -1)
>>> f1.get_bounding_box()
(0, -249, -128, 121)

5x8-bdf-pcf.zip