From 597b5f13e71738b45ff535d388e92f4a0d783612 Mon Sep 17 00:00:00 2001
From: "kipp%netscape.com"
 <kipp%netscape.com@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Sat, 13 Feb 1999 19:39:31 +0000
Subject: [PATCH] Avoid using the trapezoid data when we have none (bug #1277)

git-svn-id: svn://10.0.0.236/trunk@20667 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/layout/generic/nsBlockBandData.cpp       | 8 ++++++++
 mozilla/layout/html/base/src/nsBlockBandData.cpp | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/mozilla/layout/generic/nsBlockBandData.cpp b/mozilla/layout/generic/nsBlockBandData.cpp
index f4d1ec536a5..16ad318c0cc 100644
--- a/mozilla/layout/generic/nsBlockBandData.cpp
+++ b/mozilla/layout/generic/nsBlockBandData.cpp
@@ -103,6 +103,14 @@ nsBlockBandData::GetAvailableSpace(nscoord aY)
 void
 nsBlockBandData::ComputeAvailSpaceRect()
 {
+  if (0 == count) {
+    mAvailSpace.x = 0;
+    mAvailSpace.y = 0;
+    mAvailSpace.width = 0;
+    mAvailSpace.height = 0;
+    return;
+  }
+
   nsBandTrapezoid* trapezoid = mData;
   nsBandTrapezoid* rightTrapezoid = nsnull;
 
diff --git a/mozilla/layout/html/base/src/nsBlockBandData.cpp b/mozilla/layout/html/base/src/nsBlockBandData.cpp
index f4d1ec536a5..16ad318c0cc 100644
--- a/mozilla/layout/html/base/src/nsBlockBandData.cpp
+++ b/mozilla/layout/html/base/src/nsBlockBandData.cpp
@@ -103,6 +103,14 @@ nsBlockBandData::GetAvailableSpace(nscoord aY)
 void
 nsBlockBandData::ComputeAvailSpaceRect()
 {
+  if (0 == count) {
+    mAvailSpace.x = 0;
+    mAvailSpace.y = 0;
+    mAvailSpace.width = 0;
+    mAvailSpace.height = 0;
+    return;
+  }
+
   nsBandTrapezoid* trapezoid = mData;
   nsBandTrapezoid* rightTrapezoid = nsnull;