Bug fix in the RELIN kernel generator to use the correct named input0

[faberga]

Proposed changes

Fix to use correct input for digit decomsposition

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
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Checklist

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Further comments

Using existing tests

[jobottle]

lgtm

[christopherngutierrez]

Looks good.