Bug 317289 hang (never finish/freeze) printing selection in iframe r+sr=roc

layout/printing/nsPrintEngine.cpp

@@ -3006,9 +3006,9 @@ nsPrintEngine::PrintDocContent(nsPrintObject* aPO, nsresult& aStatus)
     }
   }
 
-  // If |aPO->mPrintAsIs| is true, the kids are processed in |PrintPage|
-  // instead of here.
-  if (!aPO->mInvisible && !aPO->mPrintAsIs) {
+  // If |aPO->mPrintAsIs| and |aPO->mHasBeenPrinted| are true,
+  // the kids frames are already processed in |PrintPage|.
+  if (!aPO->mInvisible && !(aPO->mPrintAsIs && aPO->mHasBeenPrinted)) {
     for (PRInt32 i=0;i<aPO->mKids.Count();i++) {
       nsPrintObject* po = (nsPrintObject*)aPO->mKids[i];
       PRBool printed = PrintDocContent(po, aStatus);