Missing finally return in "checkforUTF8"

no matter on Python 3: following "a.decode" uses its own default for the empty argument.
fails on Python 2, since "a.decode" requires a non-empty argument!

metrixpp/ext/std/tools/collect.py

@@ -201,6 +201,8 @@ class DirectoryReader():
                     ):
                         return "utf_8"
                 return default
+
+            return default;
           # end of checkforUTF8 ------------------------------------------------
 
         # Subroutine readtextfile