Uploads of multiple files are not validated correctly

[berz]

Seems only the first file's extension is checked. If a file with a non-whitelisted attachment follows it will raise a werkzeug error:

File "/home/voidwarranties/voidwarranties/MALMan/MALMan/views_accounting.py", line 190, in accounting_add_transaction

upload_attachments(request, attachments, transaction, DB)

File "/home/voidwarranties/voidwarranties/MALMan/MALMan/view_utils.py", line 135, in upload_attachments

name = str(accounting_attachment.id) + '.')

File "/home/voidwarranties/voidwarranties/MALMan/env/lib/python2.7/site-packages/flaskext/uploads.py", line 388, in save

raise UploadNotAllowed()