Always print the mouse cursor, even if coordinates haven't changed.

This makes sure that the cursor is always visible, even if the program
has written text to the screen (only valid for non-P/M mouse callbacks).

libsrc/atari/mou/atrjoy.s

@@ -120,12 +120,8 @@ INSTALL:
         dex
         bpl     @L1
 
-; Be sure the mouse cursor is invisible and at the default location. We
-; need to do that here, because our mouse interrupt handler doesn't set the
-; mouse position if it hasn't changed.
+; Be sure the mouse cursor is invisible and at the default location.
 
-        php
-        sei
         jsr     CHIDE
         lda     XPos
         ldx     XPos+1
@@ -133,7 +129,6 @@ INSTALL:
         lda     YPos
         ldx     YPos+1
         jsr     CMOVEY
-        plp
 
 ; Done, return zero (= MOUSE_ERR_OK)
 
@@ -316,7 +311,7 @@ INFO:   jsr     POS
 
 IOCTL:  lda     #<MOUSE_ERR_INV_IOCTL     ; We don't support ioclts for now
         ldx     #>MOUSE_ERR_INV_IOCTL
-hlprts: rts
+        rts
 
 ;----------------------------------------------------------------------------
 ; IRQ: Irq handler entry point. Called as a subroutine but in IRQ context
@@ -339,8 +334,6 @@ IRQ:
         and     #15                     ; clear joystick #1 bits
         eor     #15
         sta     Temp
-        clc
-        beq     hlprts                  ; no movement, do nothing
 
         jsr     CHIDE