Fix code review feedback and test failure.

Author: kareem-wolfssl

src/tls13.c

@@ -8577,7 +8577,10 @@ static WC_INLINE int DecodeTls13SigAlg(byte* input, byte* hashAlgo,
             break;
     #endif
         case NEW_SA_MAJOR:
-            *hashAlgo = (byte)GetNewSAHashAlgo(input[1]);
+        {
+            enum wc_MACAlgorithm mac = GetNewSAHashAlgo(input[1]);
+            *hashAlgo = (byte)mac;
+        }
 
             /* PSS encryption: 0x080[4-6] */
             if (input[1] >= RSA_PSS_RSAE_SHA256_MINOR &&

src/wolfio.c

@@ -3286,7 +3286,7 @@ int LwIPNativeSend(WOLFSSL* ssl, char* buf, int sz, void* ctx)
     err_t ret;
     WOLFSSL_LWIP_NATIVE_STATE* nlwip = (WOLFSSL_LWIP_NATIVE_STATE*)ctx;
 
-    if (sz > UINT16_MAX || sz < 0) {
+    if (sz < 0 || sz > (int)WOLFSSL_MAX_16BIT) {
         return BAD_FUNC_ARG;
     }