(x_produce_image_glyph): Pay attention to the case that

(x_produce_image_glyph): Pay attention to the case that
face->box_line_width is negative.
(x_produce_stretch_glyph): Likewise.
(x_produce_glyphs): Likewise.
(x_estimate_mode_line_height): Likewise.
(x_draw_glyph_string_background): Likewise.
(x_draw_glyph_string_foreground): Likewise.
(x_draw_composite_glyph_string_foreground): Likewise.
(x_draw_glyph_string_box): Likewise.
(x_draw_image_foreground): Likewise.
(x_draw_image_relief): Likewise.
(x_draw_image_foreground_1): Likewise.
(x_draw_image_glyph_string): Likewise.