[bug patch] egs2/iwslt22_dialect

[brianyan918]

@sw005320 I need to patch a bug in the data prep stage for this recipe.

Thanks @siddalmia for the bug report!

[codecov]

Codecov Report

Merging #4049 (e929da0) into master (b719193) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4049   +/-   ##
=======================================
  Coverage   80.93%   80.93%           
=======================================
  Files         435      435           
  Lines       37392    37392           
=======================================
  Hits        30262    30262           
  Misses       7130     7130           

Flag	Coverage Δ
test_integration_espnet1	67.24% <ø> (ø)
test_integration_espnet2	52.50% <ø> (ø)
test_python	66.58% <ø> (ø)
test_utils	24.49% <ø> (ø)

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[sw005320]

Done!
Thanks for your quick fix, @brianyan918!