userspace: buftest: add a new line after error message

Signed-off-by: Du Huanpeng <[email protected]>
diff --git a/userspace/buftest.c b/userspace/buftest.c
index 54b780a..8714a38 100644
--- a/userspace/buftest.c
+++ b/userspace/buftest.c
@@ -27,13 +27,14 @@
 
 	s = xz_dec_init(XZ_SINGLE, 0);
 	if (s == NULL) {
-		fputs("Initialization failed", stderr);
+		fputs("Initialization failed\n", stderr);
 		return 1;
 	}
 
 	b.in = in;
 	b.in_pos = 0;
 	b.in_size = fread(in, 1, sizeof(in), stdin);
+
 	b.out = out;
 	b.out_pos = 0;
 	b.out_size = sizeof(out);