Mismatched types for padding in UIComponent vs. HGroup

paddingLeft, paddingTop, etc., have type Object in mx.core.UIComponent, but they have type Number in spark.components.HGroup.

This causes VerifyError: Error #1053 in Flash Debug Player for HGroup. (And would for VGroup, etc., if they implemented.) This is the problem described in issue #953.

Which type should it be, or is this function/member overloading intentional?

Compare the padding declarations in mx.core.UIComponent and spark.components.HGroup, then investigate the reported VerifyError #1053 for HGroup. Done means resolving the type mismatch consistently and confirming that HGroup no longer triggers the error; the issue does not name a test or further entry point.

Written by the indexing model from the issue text.