Fixed several aspects of the GEOS CONIO implementation:

- cputc was drawing at the wrong position, therefore one line had to be removed as a workaround.
- chline, cvline were drawing one pixel to large lines.
- cclear was drawing an in both directions one pixel to big rect.
- the cursor was drawn at wrong times at wrong places in a wrong size.

git-svn-id: svn://svn.cc65.org/cc65/trunk@5874 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/geos-common/conio/clrscr.s

@@ -14,8 +14,6 @@
 	    .include "const.inc"
 
 _clrscr:
-	lda #ST_WR_FORE | ST_WR_BACK
-	sta dispBufferOn
 	lda curPattern		; save current pattern
 	pha
 	lda #0			; set pattern to clear
@@ -25,7 +23,6 @@ _clrscr:
 	stx r3H
 	stx r2L
 	stx cursor_c
-	inx
 	stx cursor_r
 	jsr fixcursor		; home cursor
 .ifdef __GEOS_CBM__