fix large file, mulitipart upload to s3 (#4141)

* fix large file, mulitipart upload to s3

* add changelog

Co-authored-by: Emile Indik <[email protected]>

Author: AllanZhengYP

.changes/next-release/bugfix-ManagedUpload-91473b2e.json

@@ -0,0 +1,5 @@
+{
+  "type": "bugfix",
+  "category": "ManagedUpload",
+  "description": "fix MalformedXML error for relatively large file via managed upload"
+}

lib/s3/managed_upload.js

@@ -574,7 +574,7 @@ AWS.S3.ManagedUpload = AWS.util.inherit({
       if (self.completeInfo[partNumber] && self.completeInfo[partNumber].ETag !== null) return null;
       partInfo.ETag = data.ETag;
       self.doneParts++;
-      if (self.isDoneChunking && self.doneParts === self.numParts) {
+      if (self.isDoneChunking && self.doneParts === self.totalPartNumbers) {
         self.finishMultiPart();
       } else {
         self.fillQueue.call(self);