Bug 645572 - Don't let the frame constructor's update count to become negative. r=sicking

2011-04-08 14:29:34 -07:00
parent 2aa22b9249
commit c95b9c66d8
1 changed files with 4 additions and 1 deletions
--- a/layout/base/nsCSSFrameConstructor.cpp
+++ b/layout/base/nsCSSFrameConstructor.cpp
@@ -8304,7 +8304,10 @@ nsCSSFrameConstructor::EndUpdate()
    RecalcQuotesAndCounters();
    NS_ASSERTION(mUpdateCount == 1, "Odd update count");
  }
-  --mUpdateCount;
+  // Negative update counts don't make sense
+  if (mUpdateCount > 0) {
+    --mUpdateCount;
+  }
 }

 void