Bug#13417564 SKIP SLEEP IN SRV_MASTER_THREAD WHEN

             SHUTDOWN IS IN PROGRESS 

PROBLEM
-------
 In the background thread srv_master_thread() we have a 
 a one second delay loop which will continuously monitor
 server activity .If the server is inactive (with out any
 user activity) or in a shutdown state we do some background
 activity like flushing the changes.In the current code
 we are not checking if server is in shutdown state before
 sleeping for one second.

FIX
---
If server is in shutdown state ,then dont go to one second
sleep. 

storage/innobase/srv/srv0srv.c

@@ -2432,7 +2432,7 @@ srv_master_thread(
 			by x100 (1purge/100msec), to speed up debug scripts
 			which should wait for purged. */
 
-			if (!skip_sleep) {
+			if (!skip_sleep && !srv_shutdown_state) {
 				os_thread_sleep(100000);
 			}
 
@@ -2448,7 +2448,7 @@ srv_master_thread(
 			} while (n_pages_purged);
 		} else
 #endif /* UNIV_DEBUG */
-		if (!skip_sleep) {
+		if (!skip_sleep && !srv_shutdown_state) {
 
 			os_thread_sleep(1000000);
 		}

storage/innodb_plugin/srv/srv0srv.c

@@ -2518,7 +2518,7 @@ srv_master_thread(
 			by x100 (1purge/100msec), to speed up debug scripts
 			which should wait for purged. */
 
-			if (!skip_sleep) {
+			if (!skip_sleep && !srv_shutdown_state) {
 				os_thread_sleep(100000);
 				srv_main_sleeps++;
 			}
@@ -2535,7 +2535,7 @@ srv_master_thread(
 			} while (n_pages_purged);
 		} else
 #endif /* UNIV_DEBUG */
-		if (!skip_sleep) {
+		if (!skip_sleep && !srv_shutdown_state) {
 
 			os_thread_sleep(1000000);
 			srv_main_sleeps++;