src: fulfill Maybe contract in InlineDecoder

Use an empty/nothing `Maybe<>` to indicate a pending exception.

PR-URL: nodejs#25140
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: Shelley Vohr <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: Anna Henningsen

src/string_bytes.h

@@ -42,7 +42,7 @@ class StringBytes {
       enum encoding enc = ParseEncoding(env->isolate(), encoding, _default);
       if (!StringBytes::IsValidString(string, enc)) {
         env->ThrowTypeError("Bad input string");
-        return v8::Just(false);
+        return v8::Nothing<bool>();
       }
 
       size_t storage;