csbackchk: fix python syntax

csbackchk.py

@@ -135,6 +135,9 @@ def main(argv=None):
   console.setFormatter(logging.Formatter( \
     '%(name)-8s [%(lineno)d]: %(levelname)-8s %(message)s'))
 
+  # prepare message for try-except-else conditional
+  abortmessage="program aborts unexpectedly; checks are not completed!"
+
   # fetch arguments
   if argv is None:
     argv = sys.argv
@@ -239,7 +242,6 @@ def main(argv=None):
       logger.getLogger().info( \
         "Check of files in '{0}' finished.".format(path[1]))
 
-  abortmessage="program aborts unexpectedly; checks are not completed!"
   except Usage as err:
     sys.stderr.write(str(err))
     return err.errorCode