Fix uninitialized variable peer_id

Reported by GCC

```
minetest/src/server.cpp:996:42: warning: ‘peer_id’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   errorstream << "ProcessData: peer=" << peer_id << e.what() << std::endl;
```

diff --git a/src/server.cpp b/src/server.cpp
index ed1ac326ede3396bbd7780df35a4e8292af447d4..f9550c54ffe04f807eaa345a366003cc4c9b615c 100644 (file)
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -980,7 +980,7 @@ void Server::AsyncRunStep(bool initial_step)
 
 void Server::Receive()
 {
-       session_t peer_id;
+       session_t peer_id = 0;
        try {
                NetworkPacket pkt;
                m_con->Receive(&pkt);