Merge pull request #22 from spaceChRiS/import-filters-fix

Take care for code in for loop to be run even for the last image.

official/import_filters.lua

@@ -50,6 +50,7 @@ dt.register_import_filter("prefer raw over jpeg", function(event, images)
   local current_base = ""
   local jpg_indices = {}
   local other_format_found = false
+  table.insert(images, "")
   for i, img in ipairs(images) do
     local extension = img:match("[^.]*$"):upper()
     local base = img:match("^.*[.]")
@@ -74,6 +75,7 @@ dt.register_import_filter("prefer raw over jpeg", function(event, images)
     end
 
   end
+  table.remove(images)
 end)
 
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