Fix crash when trying to send to an unreachable client

src/netcode/i_tcp.c

@@ -83,6 +83,10 @@
 	#undef ETIMEDOUT
 	#endif
 	#define ETIMEDOUT WSAETIMEDOUT
+	#ifdef EHOSTUNREACH
+	#undef EHOSTUNREACH
+	#endif
+	#define EHOSTUNREACH WSAEHOSTUNREACH
 	#ifndef IOC_VENDOR
 	#define IOC_VENDOR 0x18000000
 	#endif
@@ -678,7 +682,7 @@ static void SOCK_Send(void)
 	if (c == ERRSOCKET)
 	{
 		int e = errno; // save error code so it can't be modified later
-		if (e != ECONNREFUSED && e != EWOULDBLOCK)
+		if (e != ECONNREFUSED && e != EWOULDBLOCK && e != EHOSTUNREACH)
 			I_Error("SOCK_Send, error sending to node %d (%s) #%u: %s", doomcom->remotenode,
 				SOCK_GetNodeAddress(doomcom->remotenode), e, strerror(e));
 	}