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Jehan authored
... procedure call. This is needed for plug-ins which depends on other plug-in's procedures. If for instance, the second-level plug-in is interrupted interactively, we don't want to process this as an error but as a cancellation. Therefore we need to know the returned value of the plug-in. Currently only way was to use gimp_get_pdb_error() but that was returning a human-readable error, not a computer-processable error.
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