prevent cursor interference during screen scroll

c64/kernal/screen/screen_grow_logical_line.s

@@ -58,8 +58,7 @@ screen_grow_logical_line:
 	lda EAL+1
 	pha
 
-	// XXX prevent cursor from interfering
-	// XXX fix TBLX value
+	// XXX fix TBLX value, it seems to show logical line number, which is wrong!
 
 	// Set pointers to end of screen line, and one line
 	// above.  (It is always one physical line, because
@@ -97,6 +96,12 @@ cl_inner:
 	dey
 	bpl cl_inner
 
+	// This ugly hack prevents cursor blink interference     XXX solve this in better way
+	php
+	sei
+	jsr cursor_hide_if_visible
+	plp
+
 	// Decrement all pointers by 40
 	// Low bytes are in common pairs