* exp_ch13.adb (Expand_N_Attribute_Definition_Clause, case
Attribute_Address): When Init_Or_Norm_Scalars is True and the object
is of a scalar or string type then suppress the setting of the
expression to Empty.
* freeze.adb (Warn_Overlay): Also emit the warnings about default
initialization for the cases of scalar and string objects when
Init_Or_Norm_Scalars is True.