Fix for necko build bustage

xpfe/components/xfer/src/nsStreamXferOp.cpp

@@ -154,7 +154,7 @@ nsStreamXferOp::Start( void ) {
 #else
                 rv = NS_NewURI( &url, mSource.GetBuffer() );
                 if ( NS_SUCCEEDED( rv ) && url ) {
-                    nsresult rv = NS_OpenURI( this, nsnull, mUrl );
+                    nsresult rv = NS_OpenURI( this, nsnull, url );
                 
                     if ( NS_FAILED( rv ) ) {
                         DEBUG_PRINTF( PR_STDOUT, "%s %d: NS_OpenURI failed, rv=0x%08X\n",