Add missing lock annotations

These variables are already guarded by cs_vSend, they are just missing
the annotations.

src/net.h

@@ -759,8 +759,8 @@ class CNode
     // socket
     std::atomic<ServiceFlags> nServices{NODE_NONE};
     SOCKET hSocket GUARDED_BY(cs_hSocket);
-    size_t nSendSize{0}; // total size of all vSendMsg entries
-    size_t nSendOffset{0}; // offset inside the first vSendMsg already sent
+    size_t nSendSize GUARDED_BY(cs_vSend){0}; // total size of all vSendMsg entries
+    size_t nSendOffset GUARDED_BY(cs_vSend){0}; // offset inside the first vSendMsg already sent
     uint64_t nSendBytes GUARDED_BY(cs_vSend){0};
     std::deque<std::vector<unsigned char>> vSendMsg GUARDED_BY(cs_vSend);
     RecursiveMutex cs_vSend;
@@ -817,7 +817,7 @@ class CNode
     std::atomic_bool fPauseSend{false};
 
 protected:
-    mapMsgCmdSize mapSendBytesPerMsgCmd;
+    mapMsgCmdSize mapSendBytesPerMsgCmd GUARDED_BY(cs_vSend);
     mapMsgCmdSize mapRecvBytesPerMsgCmd GUARDED_BY(cs_vRecv);
 
 public: