* exp_ch6.adb (Add_Unconstrained_Actuals_To_Build_In_Place_Call):
Do not create a pool formal on unless RE_Root_Storage_Pool_Ptr
is available.
(Expand_N_Extended_Return_Statement): Do not create a renaming of the
build-in-place pool parameter unless RE_Root_Storage_Pool_Ptr is
available.
(Make_Build_In_Place_Call_In_Allocator): Add the user-defined
pool only if RE_Root_Storage_Pool_Ptr is available.
(Make_Build_In_Place_Call_In_Object_Declaration): Do not add a
pool actual unless RE_Root_Storage_Pool_Ptr is available.
* sem_ch6.adb (Create_Extra_Formals): Add build-in-place pool
formal only if RE_Root_Storage_Pool_Ptr is available.