Fix crash (bug 189514) by refixing bug 187297 correctly: make nsXPInstallManager's QueryInterface method succeed for nsPICertNotification. b=189514 r=timeless sr=dveditz

xpinstall/src/CertReader.cpp

@@ -120,7 +120,7 @@ static int my_inflate(unsigned char* compr, PRUint32 comprLen, unsigned char* un
 CertReader::CertReader(nsIURI* aURI, nsISupports* aContext, nsPICertNotification* aObs):
   mContext(aContext),
   mURI(aURI),
-  mObserver(do_QueryInterface(aObs))
+  mObserver(aObs)
 {
 }
 

xpinstall/src/nsXPInstallManager.cpp

@@ -118,14 +118,14 @@ nsXPInstallManager::~nsXPInstallManager()
 }
 
 
-NS_IMPL_THREADSAFE_ISUPPORTS6( nsXPInstallManager,
+NS_IMPL_THREADSAFE_ISUPPORTS7( nsXPInstallManager,
                                nsIXPIListener,
                                nsIXPIDialogService,
                                nsIObserver,
                                nsIStreamListener,
                                nsIProgressEventSink,
-                               nsIInterfaceRequestor);
-
+                               nsIInterfaceRequestor,
+                               nsPICertNotification)
 
 
 NS_IMETHODIMP