Bugfix: Allow 0-D output for gather() - #953
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The indices operand already allows rank 0, and the output rank is rank(input) + rank(indices) - 1. So a rank-1 input gathered with scalar indices legitimately produces a rank-0 output, e.g. input of shape [4] with indices of shape [] and axis 0 yields output of shape []. The output row of the tensor limits table set the minimum rank to 1, which rejected that case. Relax it to allow rank 0, matching both the indices row and gatherND()'s output row. The algorithm steps needed no change; they already produce an empty output shape for this case. Fixes webmachinelearning#946
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The indices operand already allows rank 0, and the output rank is rank(input) + rank(indices) - 1. So a rank-1 input gathered with scalar indices produces a rank-0 output.
The algorithm steps needed no change; they already produce an empty output shape for this case.
Fixes #946