* atree.adb: Set Error_Posted in Error node, helps error recovery.
* par-endh.adb (Output_End_Expected): We should also not test
Error_Posted on the Error node, since now it is always set.
* cstand.adb (Create_Standard): Set Etype of Error to Any_Type
to help error recovery. Part of general work on 9407-004.
* par.adb: Add ??? for misuse of error
* sem_res.adb:
(Resolve): Defend against Error, fixes 9407-003.
(Resolve_Discrete_Subtype_Indication): Defend against Error.
* sinfo.ads (N_Error): Now has Etype field (which will be set
to Any_Type to help error recovery).
From-SVN: r46077
