Fix incorrect handling of ziped formats formats

The previous behavior was to use python's mimetype module
on ziped format, to guess what type of file it precisely is.

But sometimes, this fail. This commit fix this corner-case.

1 files changed, 2 insertions, 1 deletions

diff --git a/MAT/mat.py b/MAT/mat.py
index 8c92a33..af12466 100644
--- a/MAT/mat.py
+++ b/MAT/mat.py
@@ -144,7 +144,8 @@ def create_class_file(name, backup, **kwargs):
     mime = parser.mime_type
 
     if mime == 'application/zip':  # some formats are zipped stuff
-        mime = mimetypes.guess_type(name)[0]
+        if mimetypes.guess_type(name)[0] is not None:
+            mime =  mimetypes.guess_type(name)[0]
 
     if mime.startswith('application/vnd.oasis.opendocument'):
         mime = 'application/opendocument'  # opendocument fileformat