sem_ch3.adb, [...]: Protect call to Current_Subprogram which might be costly when repeated.

2011-08-02  Yannick Moy  <moy@adacore.com>

	* sem_ch3.adb, sem_ch5.adb, sem_ch9.adb, sem_util.adb, sem_util.ads,
	sem_res.adb, sem_ch2.adb, sem_ch4.adb, sem_ch6.adb,
	sem_ch11.adb: Protect call to Current_Subprogram which might be costly
	when repeated. Rename Current_Subprogram_Is_Not_In_ALFA into
	Mark_Non_ALFA_Subprogram_Body.
	Split body of Mark_Non_ALFA_Subprogram_Body to get body small and
	inlined.

From-SVN: r177182