Back compat issues in delete(d)_postmeta actions
|Reported by:||duck_||Owned by:||duck_|
I was looking at #18823 and noticed some backwards compatibility issues with the delete(d)_postmeta actions in 3.3.
- The deleted_postmeta action disappeared (see delete_metadata_by_mid); this was probably a copy and paste error.
- delete_meta( $mid ) will now run the delete_postmeta action with the post ID ($object_id) instead of the $mid.
Patch attached fixes these up to be backwards compatible with s/$object_id/$meta_id/ and adding the missing 'd'.