fix: resolve IndexError when using spk model and the audio contains only 1 ...

Atomie CHEN

2024-03-25 ff83116369ba6afe56430cb0b9d977fbe7f4bced

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isa    1
dalawa    2
tatlo    3
apat    4
lima    5
anim    6
pito    7
walo    8
siyam    9