Avoid a firmware bug in defining custom characters.

Since icons now work everywhere, enable them.
diff --git a/contiki-cpc/conf/ctk-conf.h b/contiki-cpc/conf/ctk-conf.h
index cfe4925..f03c7f9 100644
--- a/contiki-cpc/conf/ctk-conf.h
+++ b/contiki-cpc/conf/ctk-conf.h
@@ -64,10 +64,10 @@
 #define CTK_CONF_ICONS                1 /* 107 bytes */
 
 /* Toggles support for icon bitmaps. */
-#define CTK_CONF_ICON_BITMAPS         0
+#define CTK_CONF_ICON_BITMAPS         1
 
 /* Toggles support for icon textmaps. */
-#define CTK_CONF_ICON_TEXTMAPS        1
+#define CTK_CONF_ICON_TEXTMAPS        0
 
 /* Toggles support for movable windows. */
 #define CTK_CONF_WINDOWMOVE           1 /* 333 bytes */
diff --git a/contiki-cpc/ctk/ctk-conio-service.c b/contiki-cpc/ctk/ctk-conio-service.c
index fe10cfc..f162681 100644
--- a/contiki-cpc/ctk/ctk-conio-service.c
+++ b/contiki-cpc/ctk/ctk-conio-service.c
@@ -91,8 +91,19 @@
 	pop hl
 	push hl
 	push de
+	; Can't use SCR SET MATRIX because some of our icons are in RAM under 0x4000.
+	; SCR SET MATRIX then gets data from the firmware ROM...
+	ld a,#0x19
+	call 0xBB5a
 	ld a,#0xff
-	jp 0xbba8 ; SCR SET MATRIX
+	call 0xBB5a
+	ld b,#8
+00001$:
+	ld a,(hl)
+	call 0xbb5a
+	inc hl
+	djnz 00001$
+	ret
     __endasm;
 }
 
@@ -219,7 +230,6 @@
       gotoxy(xpos, ypos);
       if(w->widget.icon.bitmap != NULL) {
 	  unsigned char* ptr  = w->widget.icon.bitmap;
-	  printf("ICON BMP %p\r\n", ptr);
 	for(i = 0; i < 3; ++i) {
 	  gotoxy(xpos, ypos);
 	  if(ypos >= clipy1 && ypos < clipy2) {
@@ -299,7 +309,7 @@
 /*-----------------------------------------------------------------------------------*/
 
 static void clearrect(unsigned char x2, unsigned char y2,
-	unsigned char x1, unsigned char y1)
+	unsigned char x1, unsigned char y1) __naked
 {
   __asm
 		ld		hl,#2
@@ -341,6 +351,9 @@
   i = window->y + 2; // +1 for the border, +1 for ctk > cpc conversion
   h = i + window->h;
 
+  if (i >= clipy2 || h < clipy1)
+	  return;
+
   if (i < clipy1) i = clipy1;
   --clipy2;
   if (h > clipy2) h = clipy2;
@@ -509,7 +522,8 @@
 		ld		l,d
 		ld d,#40
 
-		inc e
+		dec e
+		;inc e
 
 		call	0xBB99 ; TXT GET PAPER
 		call	0xBC2C ; SCR INK ENCODE