ANDROID: fuse-bpf: Fix misuse of args.out_args

Test: fuse_test
Bug: 202785178
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: I332d196329bba257a577d3ddc140136aa03bfdf1
diff --git a/fs/fuse/backing.c b/fs/fuse/backing.c
index 2959a69..b68f4f5 100644
--- a/fs/fuse/backing.c
+++ b/fs/fuse/backing.c
@@ -2439,7 +2439,7 @@
 	};
 	if (args.force)
 		bpf_args->flags |= FUSE_BPF_FORCE;
-	if (args.out_args)
+	if (args.out_argvar)
 		bpf_args->flags |= FUSE_BPF_OUT_ARGVAR;
 	for (i = 0; i < args.in_numargs; ++i)
 		bpf_args->in_args[i] = (struct fuse_bpf_in_arg) {