LibCore: Propagate errors from Stream::*_entire_buffer

Author: https://github.com/timschumi
Commit: 9a3e95785e
Pull-request: https://github.com/SerenityOS/serenity/pull/16429
Reviewed-by: https://github.com/sin-ack ✅

Userland/Libraries/LibHTTP/Job.cpp

@@ -220,7 +220,7 @@ void Job::on_socket_connected()
         dbgln("{}", DeprecatedString::copy(raw_request));
     }
 
-    bool success = m_socket->write_entire_buffer(raw_request);
+    bool success = !m_socket->write_entire_buffer(raw_request).is_error();
     if (!success)
         deferred_invoke([this] { did_fail(Core::NetworkJob::Error::TransmissionFailed); });