[repo/sql] don't do anything when value is None. This will avoid None to be turned into False in the case of a boolean for instance.

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\.svn

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^build$

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^dist$

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\.pyc$

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\.pyo$

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\.bak$

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\.old$

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\~$

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\#.*?\#$

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\.swp$

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^doc/book/en/apidoc$