From 7dfde61fc95715fc86742d302e7a7e40c438742e Mon Sep 17 00:00:00 2001
From: rickg <rickg>
Date: Thu, 21 May 1998 20:37:17 +0000
Subject: [PATCH] minor perf improvement to deque

---
 base/src/nsDeque.cpp | 4 ++--
 xpcom/ds/nsDeque.cpp | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/base/src/nsDeque.cpp b/base/src/nsDeque.cpp
index bd573d00aab..7641099e2fb 100644
--- a/base/src/nsDeque.cpp
+++ b/base/src/nsDeque.cpp
@@ -160,8 +160,8 @@ void* nsDeque::PopBack(void) {
     int offset=mOrigin+mSize;
     if(offset>=mCapacity) 
       offset-=mCapacity;
-    result=mData[offset];
-    mData[offset]=0;
+    result=mData[offset-1];
+    mData[offset-1]=0;
     mSize--;
     if(0==mSize)
       mOrigin=0;
diff --git a/xpcom/ds/nsDeque.cpp b/xpcom/ds/nsDeque.cpp
index bd573d00aab..7641099e2fb 100644
--- a/xpcom/ds/nsDeque.cpp
+++ b/xpcom/ds/nsDeque.cpp
@@ -160,8 +160,8 @@ void* nsDeque::PopBack(void) {
     int offset=mOrigin+mSize;
     if(offset>=mCapacity) 
       offset-=mCapacity;
-    result=mData[offset];
-    mData[offset]=0;
+    result=mData[offset-1];
+    mData[offset-1]=0;
     mSize--;
     if(0==mSize)
       mOrigin=0;