fuse: reset waiting

Reset req->waiting in fuse_put_request().  This is needed for correct
accounting in fc->num_waiting for reserved requests.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

fs/fuse/dev.c

@@ -287,8 +287,10 @@ void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req)
 			spin_unlock(&fc->lock);
 		}
 
-		if (req->waiting)
+		if (req->waiting) {
 			atomic_dec(&fc->num_waiting);
+			req->waiting = 0;
+		}
 
 		if (req->stolen_file)
 			put_reserved_req(fc, req);