Fix error uploading empty file with fileupload control (#183)

Author: claudiamurialdo

java/src/main/java/com/genexus/webpanels/GXObjectUploadServices.java

@@ -46,8 +46,6 @@ protected void doExecute(HttpContext context) throws Exception
 							fileName = file.getName();
 
 						long fileSize = file.getSize(); 
-						if (fileSize == 0)
-							continue;
 
 						String ext = CommonUtil.getFileType(fileName);
 						String savedFileName = "";