fixes bug 311456 "Calling Truncate() on an nsAutoString makes next append work hard" r+sr=bzbarsky

git-svn-id: svn://10.0.0.236/trunk@181788 18797224-902f-48f8-a5cc-f745e15eee43
2005-10-07 21:52:18 +00:00
parent 112c09494d
commit 467e6b2b97
1 changed files with 3 additions and 0 deletions
--- a/mozilla/xpcom/string/src/nsTSubstring.cpp
+++ b/mozilla/xpcom/string/src/nsTSubstring.cpp
@@ -542,6 +542,9 @@ nsTSubstring_CharT::SetCapacity( size_type capacity )
 void
 nsTSubstring_CharT::SetLength( size_type length )
  {
+    if (mLength == length)
+      return;
+
    SetCapacity(length);

    // XXX(darin): SetCapacity may fail, but it doesn't give us a way to find