Insert instruction fails

[Zekfad]

Following code fails for some files (state.debuginfo.addr_to_line_map is empty, so index our of bounds exception is thrown):

https://github.com/Aussiemon/ljd/blob/2ed0381b2e563531b0fe8de0a574cea8e6a04478/ljd/ast/builder.py#L1265

My workaround was

    line_mapping = -1
    if preceding_index >= 0 and preceding_index < len(state.debuginfo.addr_to_line_map):
        line_mapping = state.debuginfo.addr_to_line_map[preceding_index]

Not sure if it's a good or bad fix, but it does work.