(partially) Fix Bug#55227 Fix compiler warnings in innodb with gcc 4.6

Fix compiler warning:
lock/lock0lock.c: In function 'lock_print_info_all_transactions':
lock/lock0lock.c:4299:10: error: variable 'page' set but not used [-Werror=unused-but-set-variable]

storage/innobase/lock/lock0lock.c

@@ -4296,7 +4296,6 @@ lock_print_info_all_transactions(
 	lock_t*	lock;
 	ulint	space;
 	ulint	page_no;
-	page_t*	page;
 	ibool	load_page_first = TRUE;
 	ulint	nth_trx		= 0;
 	ulint	nth_lock	= 0;
@@ -4410,8 +4409,7 @@ loop:
 
 			mtr_start(&mtr);
 
-			page = buf_page_get_with_no_latch(
-				space, page_no, &mtr);
+			buf_page_get_with_no_latch(space, page_no, &mtr);
 
 			mtr_commit(&mtr);