Settings: escape extension dots in default EXCLUDE list, avoid empty …

…entry.

filebrowser/settings.py

@@ -3,6 +3,7 @@
 # django imports
 from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
+import re
 
 # PATH AND URL SETTINGS
 
@@ -77,7 +78,7 @@
 # Default is to exclude 'thumbnail' style naming of image-thumbnails.
 EXTENSION_LIST = []
 for exts in EXTENSIONS.values():
-    EXTENSION_LIST += exts
+    EXTENSION_LIST += [re.escape(ext) for ext in exts if ext]
 EXCLUDE = getattr(settings, 'FILEBROWSER_EXCLUDE', (r'_(%(exts)s)_.*_q\d{1,3}\.(%(exts)s)' % {'exts': ('|'.join(EXTENSION_LIST))},))
 # Max. Upload Size in Bytes.
 MAX_UPLOAD_SIZE = getattr(settings, "FILEBROWSER_MAX_UPLOAD_SIZE", 10485760)