vt/fbcon: update scrl_erase_char after 256/512-glyph font switch

Addendum to commit c9e587abfdec2c2aaa55fab83bcb4972e2f84f9b ("vt: fix
background color on line feed").

vc->vc_scrl_erase_char was not updated when fbcon switches between
256- and 512-glyph fonts.

Signed-off-by: Jan Engelhardt <[e-mail]>
Acked-by: David S. Miller <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/video/console/fbcon.c

···
 			c = vc->vc_video_erase_char;
 			vc->vc_video_erase_char =
 			    ((c & 0xfe00) >> 1) | (c & 0xff);
+			c = vc->vc_def_color;
+			vc->vc_scrl_erase_char =
+			    ((c & 0xFE00) >> 1) | (c & 0xFF);
 			vc->vc_attr >>= 1;
 		}
 	} else if (!vc->vc_hi_font_mask && cnt == 512) {
···
 			if (vc->vc_can_do_color) {
 				vc->vc_video_erase_char =
 				    ((c & 0xff00) << 1) | (c & 0xff);
+				c = vc->vc_def_color;
+				vc->vc_scrl_erase_char =
+				    ((c & 0xFF00) << 1) | (c & 0xFF);
 				vc->vc_attr <<= 1;
-			} else
+			} else {
 				vc->vc_video_erase_char = c & ~0x100;
+				vc->vc_scrl_erase_char = c & ~0x100;
+			}
 		}
 
 	}