From 2df4ad3de201d23b85023571b4d1028b3b5be6f3 Mon Sep 17 00:00:00 2001
From: Sjoerd van der Berg <harekiet@users.sourceforge.net>
Date: Sat, 28 Dec 2002 13:24:23 +0000
Subject: [PATCH] Fix bug with sierra installer's using scroll to clear areas
 of the screen.

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@607
---
 src/ints/int10_char.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/ints/int10_char.cpp b/src/ints/int10_char.cpp
index 82449517..a6842874 100644
--- a/src/ints/int10_char.cpp
+++ b/src/ints/int10_char.cpp
@@ -111,6 +111,7 @@ void INT10_ScrollWindow(Bit8u rul,Bit8u cul,Bit8u rlr,Bit8u clr,Bit8s nlines,Bit
 	if(rlr>=nrows) rlr=(Bit8u)nrows-1;
 	if(clr>=ncols) clr=(Bit8u)ncols-1;
 	clr++;
+
 	/* Get the correct page */
 	if(page==0xFF) page=real_readb(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
 	VGAMODES * curmode=GetCurrentMode();	
@@ -131,7 +132,7 @@ void INT10_ScrollWindow(Bit8u rul,Bit8u cul,Bit8u rlr,Bit8u clr,Bit8s nlines,Bit
 		nlines=rlr-rul+1;
 		goto filling;
 	}
-	do {
+	while (start!=end) {
 		start+=next;
 		switch (curmode->memmodel) {
 		case MTEXT:
@@ -142,7 +143,7 @@ void INT10_ScrollWindow(Bit8u rul,Bit8u cul,Bit8u rlr,Bit8u clr,Bit8s nlines,Bit
 		case PLANAR4:		
 			PLANAR4_CopyRow(curmode,cul,clr,start,start+nlines,base);break;
 		}	
-	} while (start!=end);
+	} 
 	/* Fill some lines */
 filling:
 	if (nlines>0) {