uv_encoding: Check message->type overflow.

Author: Mathieu Borderé

src/uv_encoding.c

@@ -1,5 +1,6 @@
 #include "uv_encoding.h"
 
+#include <limits.h>
 #include <string.h>
 
 #include "../include/raft/uv.h"
@@ -481,7 +482,10 @@ int uvDecodeMessage(const unsigned long type,
     unsigned i;
     int rv = 0;
 
-    /* TODO: check type overflow */
+    if (type > USHRT_MAX) {
+        return RAFT_INVALID;
+    }
+
     message->type = (unsigned short)type;
 
     *payload_len = 0;