Another python error in lyxpreview2bitmap.py

[Jürgen Spitzmüller]

With master, open the German User Guide:

Traceback (most recent call last):
  File "/home/juergen/lyx/lyx-devel/lib/scripts/lyxpreview2bitmap.py",
line 594, in <module>
    sys.exit(main(sys.argv)[0])
  File "/home/juergen/lyx/lyx-devel/lib/scripts/lyxpreview2bitmap.py",
line 446, in main
    return legacy_conversion_step1(latex_file, dpi, output_format,
fg_color,
  File "/home/juergen/lyx/lyx-
devel/lib/scripts/legacy_lyxpreview2ppm.py", line 337, in
legacy_conversion_step1
    return legacy_conversion_step3(latex_file, dpi, output_format,
True, skipMetrics)
  File "/home/juergen/lyx/lyx-
devel/lib/scripts/legacy_lyxpreview2ppm.py", line 566, in
legacy_conversion_step3
    legacy_metrics.pop(index - 1)
IndexError: pop from empty list


Jürgen
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