[COMMITTED] ada: Fix spurious error on generic state in SPARK

["Marc Poulhiès" <poulhies@adacore.com>]

From: Yannick Moy <moy@adacore.com>

The public state of a generic package needs not be part of the state of
the enclosing unit, only the state of instantiations need to be accounted
for in the enclosing package. Now fixed.

gcc/ada/

	* sem_util.adb (Find_Placement_In_State_Space): Stop search for
	placement when reaching the public state of a generic package.

Tested on x86_64-pc-linux-gnu, committed on master.

---
 gcc/ada/sem_util.adb | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gcc/ada/sem_util.adb b/gcc/ada/sem_util.adb
index 3af029fd9a3..d629c76fd47 100644
--- a/gcc/ada/sem_util.adb
+++ b/gcc/ada/sem_util.adb
@@ -9103,6 +9103,14 @@ package body Sem_Util is
                Placement := Private_State_Space;
                return;
 
+            --  The item or its enclosing package appear in the visible state
+            --  space of a generic package.
+
+            elsif Ekind (Pack_Id) = E_Generic_Package then
+               Placement := Not_In_Package;
+               Pack_Id := Empty;
+               return;
+
             --  When the item appears in the visible state space of a package,
             --  continue to climb the scope stack as this may not be the final
             --  state space.
-- 
2.43.2