Fix a bug that can cause large fonts to not be read correctly.

src/gdisp/mcufont/mf_bwfont.h

@@ -63,7 +63,7 @@ struct mf_bwfont_s
     const uint8_t version;
     
     /* Number of character ranges. */
-    const uint8_t char_range_count;
+    const uint16_t char_range_count;
     
     /* Array of the character ranges */
     const struct mf_bwfont_char_range_s *char_ranges;

src/gdisp/mcufont/mf_rlefont.c

@@ -46,7 +46,7 @@ static const uint8_t *find_glyph(const struct mf_rlefont_s *font,
        index = character - range->first_char;
        if (character >= range->first_char && index < range->char_count)
        {
-           uint16_t offset = range->glyph_offsets[index];
+           unsigned offset = range->glyph_offsets[index];
            return &range->glyph_data[offset];
        }
    }

src/gdisp/mcufont/mf_rlefont.h

@@ -60,7 +60,7 @@ struct mf_rlefont_s
     const uint8_t dict_entry_count;
     
     /* Number of discontinuous character ranges */
-    const uint8_t char_range_count;
+    const uint16_t char_range_count;
     
     /* Array of the character ranges */
     const struct mf_rlefont_char_range_s *char_ranges;