Avoid evaluating void variables #737
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The last `unless` case of `unicode-tokens-copy-configuration-variables` tries to evaluate variables which may be undefined via `symbol-value`, which leads to an error. This commit adds a check to make sure the variables are only accessed if bound.
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The last
unlesscase ofunicode-tokens-copy-configuration-variablestries to evaluate variables which may be undefined viasymbol-value, which leads to an error. This commit adds a check to make sure the variables are only accessed if bound.How this ever worked without errors I don't know...