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Bug 1245246: Add null check for mDocViewerPrint in nsPrintEngine::FirePrintingErrorEvent. r=roc

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This commit is contained in:
Bob Owen 2016-02-04 08:03:52 +00:00
parent 6f377eae5e
commit fdbee7016b
1 changed files with 4 additions and 0 deletions
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4
layout/printing/nsPrintEngine.cpp
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@ -1522,6 +1522,10 @@ void
nsPrintEngine::FirePrintingErrorEvent(nsresult aPrintError)
{
nsCOMPtr<nsIContentViewer> cv = do_QueryInterface(mDocViewerPrint);
if (NS_WARN_IF(!cv)) {
return;
}
nsCOMPtr<nsIDocument> doc = cv->GetDocument();
RefPtr<CustomEvent> event =
NS_NewDOMCustomEvent(doc, nullptr, nullptr);