Fix f_1270

Author: yosuke-wolfssl

src/internal.c

@@ -9407,7 +9407,7 @@ static int DoChannelFailure(WOLFSSH* ssh, byte* buf, word32 len, word32* idx)
 
     WLOG(WS_LOG_DEBUG, "Entering DoChannelFailure()");
 
-    if (ssh == NULL || buf == NULL || len != 0 || idx == NULL)
+    if (ssh == NULL || buf == NULL || len == 0 || idx == NULL)
         ret = WS_BAD_ARGUMENT;
 
     if (ret == WS_SUCCESS)