crash when running with only one source

[Kunsi]

Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:     INFO Pipeline: pipeline launched successfuly
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:     INFO AudioMix: Updating mixer state
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]: Traceback (most recent call last):
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:   File "/opt/voctomix2/release/voctocore/voctocore.py", line 111, in <module>
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:     main()
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:   File "/opt/voctomix2/release/voctocore/voctocore.py", line 98, in main
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:     voctocore = Voctocore()
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:                 ^^^^^^^^^^^
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:   File "/opt/voctomix2/release/voctocore/voctocore.py", line 49, in __init__
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:     self.pipeline = Pipeline()
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:                     ^^^^^^^^^^
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:   File "/opt/voctomix2/release/voctocore/lib/pipeline.py", line 176, in __init__
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:     bin.attach(self.pipeline)
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:   File "/opt/voctomix2/release/voctocore/lib/videomix.py", line 122, in attach
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:     0].name, self.sources[0], self.sources[1])
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]:                               ~~~~~~~~~~~~^^^
Tue 2024-12-03 12:57:46 CET encoder96.lan.c3voc.de voctocore.py[469997]: IndexError: list index out of range