buffer: simplify check size in assertSize

PR-URL: #18665
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/buffer.js

@@ -237,9 +237,7 @@ function assertSize(size) {
 
   if (typeof size !== 'number') {
     err = new errors.TypeError('ERR_INVALID_ARG_TYPE', 'size', 'number', size);
-  } else if (size < 0) {
-    err = new errors.RangeError('ERR_INVALID_OPT_VALUE', 'size', size);
-  } else if (size > kMaxLength) {
+  } else if (size < 0 || size > kMaxLength) {
     err = new errors.RangeError('ERR_INVALID_OPT_VALUE', 'size', size);
   }