Fix an error found by @FedericoBerlfein that amounted to GSObjects missing a method needed to properly duck type as ChromaticObjects in some cases.
Specifically, if an inseparable chromatic object is convolved with a GSObject (in Federico's case, a Pixel), then a bit of code tries to call _fiducial_profile on the separable components, which didn't work, since GSObject didn't have this method. The fix is simply to add a trivial version of that method so the GSObject duck types properly in this context.
Fix an error found by @FedericoBerlfein that amounted to GSObjects missing a method needed to properly duck type as ChromaticObjects in some cases.
Specifically, if an inseparable chromatic object is convolved with a GSObject (in Federico's case, a Pixel), then a bit of code tries to call
_fiducial_profileon the separable components, which didn't work, since GSObject didn't have this method. The fix is simply to add a trivial version of that method so the GSObject duck types properly in this context.