make get_file() return its argument

simplifies a bunch of callers...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index f4246cf..8c23fa7 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -148,8 +148,7 @@
 		if (ff->reserved_req) {
 			req = ff->reserved_req;
 			ff->reserved_req = NULL;
-			get_file(file);
-			req->stolen_file = file;
+			req->stolen_file = get_file(file);
 		}
 		spin_unlock(&fc->lock);
 	} while (!req);