declaredConstructors.exists does not find parameterless (default) ctors

[Buggaboo]

./Xtendroid/src//org/xtendroid/annotations/AndroidDialogFragment.xtend:33:      if (!clazz.declaredConstructors.exists[ctor|ctor.parameters.empty]) {
./Xtendroid/src//org/xtendroid/annotations/AndroidFragment.xtend:43:      if (!clazz.declaredConstructors.exists[ctor|ctor.parameters.empty]) {
./Xtendroid/src//org/xtendroid/db/AndroidDatabase.xtend:52:      clazz.declaredConstructors.forEach[c|
./Xtendroid/src//org/xtendroid/parcel/ParcelableProperty.xtend:282://       clazz.declaredConstructors.forEach[ /*body === null &&*/ clazz.addWarning(String.format('%s: %b', simpleName, parameters.empty)) ] // debug
./Xtendroid/src//org/xtendroid/parcel/ParcelableProperty.xtend:283:     val isEmptyCtorProvidedByUser = clazz.declaredConstructors.exists[ /*body === null &&*/ parameters.empty ]

For some reason, none of these are correctly detecting the default ctor at transpile time.

This general problem is related to issue #97.