Reduce flickering while resizing windows

shell.asm

@@ -263,35 +263,49 @@ mouse:
 ;  si = pointer to window structure
 resize:
 	push dx
+	push bp
+
+	xor bp, bp ; Change?
 
 	mov dx, [si + window.res_y]
 	sub dx, bx
-	jc .x
+	jc .end_y
 	cmp dx, WINDOW_MIN_HEIGHT
-	jl .x
+	jl .end_y
 	cmp dx, ROWS
-	jg .x
+	jg .end_y
 
+	cmp [si + window.y], bx
+	je .end_y
+	inc bp
 	mov [si + window.y], bx
 	mov [si + window.height], dx
 
-	.x:
+	.end_y:
 	mov dx, [si + window.res_x]
 	sub dx, cx
-	jc .done
+	jc .end_x
 	cmp dx, WINDOW_MIN_WIDTH
-	jl .done
+	jl .end_x
 	cmp dx, COLUMNS
-	jg .done
+	jg .end_x
 
+	cmp [si + window.x], cx
+	je .end_x
+	inc bp
 	mov [si + window.x], cx
 	mov [si + window.width], dx
 
-	.done:
-	pop dx
+	.end_x:
+	test bp, bp
+	jz .end
 
 	call render_file_window
 	call request_redraw
+
+	.end:
+	pop bp
+	pop dx
 	ret
 
 ; in:
@@ -311,7 +325,7 @@ move:
 	jne .change
 	jmp .end
 
-	.change
+	.change:
 		mov [si + window.y], bx
 		mov [si + window.x], dx