OPDS: fix off-by-one in sync sub_table access#15073
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When an OPDS catalog entry's URL resolves to a sub_table with only one element, sub_table[2] returns nil, causing a crash on the subsequent item.acquisitions access. Fall back to sub_table[1] when index 2 is nil.
0xstillb
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May 9, 2026
When an OPDS catalog entry's URL resolves to a sub_table with only one element, sub_table[2] returns nil, causing a crash on the subsequent item.acquisitions access. Fall back to sub_table[1] when index 2 is nil.
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This PR fixes crash during OPDS sync download when a catalog entry's URL resolves to a
sub_tablewith exactly one element. In that case,sub_table[2]returnsnil, causing "attempt to index a nil value" onitem.acquisitions.This change is