fuse: add missing fuse_request_free

The error handling code for the second call to fuse_request_alloc should
include freeing the result of the first one.

This bug was found by the Coccinelle project:

  http://www.emn.fr/x-info/coccinelle/Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

fs/fuse/inode.c

@@ -865,7 +865,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 	if (is_bdev) {
 		fc->destroy_req = fuse_request_alloc();
 		if (!fc->destroy_req)
-			goto err_put_root;
+			goto err_free_init_req;
 	}
 
 	mutex_lock(&fuse_mutex);
@@ -895,6 +895,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 
  err_unlock:
 	mutex_unlock(&fuse_mutex);
+ err_free_init_req:
 	fuse_request_free(init_req);
  err_put_root:
 	dput(root_dentry);