freeze.adb: Make Freeze_Fixed_Point_Type visible, for use in sem_attr.
* freeze.adb: Make Freeze_Fixed_Point_Type visible, for use in
sem_attr.
* sem_attr.adb: Simplify previous fix for Address.
(Set_Bounds): If prefix is a non-frozen fixed-point type, freeze now,
to avoid anomalies where the bound of the type appears to raise
constraint error.
* lib-xref.adb (Output_Refs): Make sure pointers are always properly
handled.
* sem_ch12.adb (Analyze_Subprogram_Instantiation): Check for a
renamed unit before checking for recursive instantiations.