--write-interval-volumes for WDIAGNOSTIC warps

[chrisadamsonmcri]

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] The --write-interval-volumes option does not work for transformation types that have WDIAGNOSTIC messages.

Describe the solution you'd like A clear and concise description of what you want to happen. Please put this feature in.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered. Tried porting code from Examples/antsRegistrationOptimizerCommandIterationUpdate.h to Examples/antsRegistrationCommandIterationUpdate.h and it didn't work.

Additional context Add any other context or screenshots about the feature request here. No other info.

[chrisadamsonmcri]

Bump. This would be really good at the moment since I'm trying to tune BSplineSyN. Thanks in advance.