From aee29710bd7d156373dc02356e3f5a16acb694e3 Mon Sep 17 00:00:00 2001
From: Darkvater <darkvater@openttd.org>
Date: Sun, 14 Jan 2007 21:50:56 +0000
Subject: [PATCH] (svn r8133) -Fix [FS#535]: "out of sprite memory" warning
 messages due to incorrect assumption of requested memory for sprites (smatz)

---
 src/viewport.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/viewport.cpp b/src/viewport.cpp
index 46d9d77c96..5d9b395e9b 100644
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -1293,7 +1293,7 @@ void ViewportDoDraw(const ViewPort *vp, int left, int top, int right, int bottom
 // If we do, the sprite memory will overflow.
 static void ViewportDrawChk(const ViewPort *vp, int left, int top, int right, int bottom)
 {
-	if (((bottom - top) * (right - left) << vp->zoom) > 180000) {
+	if (((bottom - top) * (right - left) << (2 * vp->zoom)) > 180000) {
 		if ((bottom - top) > (right - left)) {
 			int t = (top + bottom) >> 1;
 			ViewportDrawChk(vp, left, top, right, t);