dynamicFBA changes 0 initial Conditions

[tpfau]

When initializing dynamic FBA it assumes, that exchange reactions which can take up metabolites and are assigned a 0 concentration will be non limiting.
Essentially, those initial concentrations are set to 1000 instead of an explicitly provided value of 0.

I would suggest to change this behaviour such that if a concentration is given it will be used, and only if it is not provided a non limitation is assumed.
However, this would break potential code which relied on this 'bug'.

What's your opinion @rmtfleming ?

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[rmtfleming]

That seems sensible, however I rarely use dynamicFBA so perhaps others could comment.