[TAP] Fix bug with the UPLOAD parameter: on any job parameter modification...

[TAP] Fix bug with the UPLOAD parameter: on any job parameter modification (with a 2nd http request), the UPLOAD parameter was deleted

src/tap/parameters/DALIUpload.java

@@ -323,9 +323,9 @@ public class DALIUpload {
 						uploads.add(upl);
 						if (!upl.isByReference())
 							usedFiles.add(upl.file.paramName);
-
+					}
 					// CASE String: it must be parsed and transformed into a DALIUpload item which will be then added inside the list:
-					}else if (value instanceof String)
+					else if (value instanceof String)
 						fetchDALIUploads(uploads, usedFiles, (String)value, requestParams, allowTAPSyntax, fileManager);
 
 					// CASE Array: 
@@ -382,6 +382,7 @@ public class DALIUpload {
 		}
 
 		// 3. Re-add a new "UPLOAD" parameter gathering all extracted DALI Uploads:
+		if (uploads.size() > 0)
 			requestParams.put("UPLOAD", uploads.toArray(new DALIUpload[uploads.size()]));
 
 		return uploads;