[Ada] Ignore subprogram address in ownership checking

Ownership checking done as in GNATprove should ignore address of
subprograms, as it applies only on objects. Now fixed.

There is no impact on compilation.

2019-08-21  Yannick Moy  <moy@adacore.com>

gcc/ada/

	* sem_spark.adb (Process_Path): Do nothing on address of
	subprogram.

From-SVN: r274779

gcc/ada/ChangeLog

+2019-08-21  Yannick Moy  <moy@adacore.com>
+
+	* sem_spark.adb (Process_Path): Do nothing on address of
+	subprogram.
+
 2019-08-21  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* exp_util.adb (Finalize_Address): Deal consistently with

gcc/ada/sem_spark.adb

@@ -5110,6 +5110,7 @@ package body Sem_SPARK is
       --  in an object.
 
       if not Present (Root)
+        or else not Is_Object (Root)
         or else not Is_Deep (Etype (Root))
       then
          return;