ext4: "ret" may be used uninitialized in ext4_lazyinit_thread()

Newer GCC's reported the following build warning:

   fs/ext4/super.c: In function 'ext4_lazyinit_thread':
   fs/ext4/super.c:2702: warning: 'ret' may be used uninitialized in this function

Fix it by removing the need for the ret variable in the first place.
Signed-off-by: N"Lukas Czerner" <lczerner@redhat.com>
Reported-by: N"Stefan Richter" <stefanr@s5r6.in-berlin.de>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

fs/ext4/super.c

@@ -2699,7 +2699,6 @@ static int ext4_lazyinit_thread(void *arg)
 	struct ext4_li_request *elr;
 	unsigned long next_wakeup;
 	DEFINE_WAIT(wait);
-	int ret;
 
 	BUG_ON(NULL == eli);
 
@@ -2723,14 +2722,13 @@ static int ext4_lazyinit_thread(void *arg)
 			elr = list_entry(pos, struct ext4_li_request,
 					 lr_request);
 
-			if (time_after_eq(jiffies, elr->lr_next_sched))
-				ret = ext4_run_li_request(elr);
-
-			if (ret) {
-				ret = 0;
+			if (time_after_eq(jiffies, elr->lr_next_sched)) {
+				if (ext4_run_li_request(elr) != 0) {
+					/* error, remove the lazy_init job */
 					ext4_remove_li_request(elr);
 					continue;
 				}
+			}
 
 			if (time_before(elr->lr_next_sched, next_wakeup))
 				next_wakeup = elr->lr_next_sched;