__register_binfmt() made void

Just don't pass NULL to it - nobody does, anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c
index cc8560f..ec15972 100644
--- a/fs/binfmt_som.c
+++ b/fs/binfmt_som.c
@@ -289,7 +289,8 @@
 
 static int __init init_som_binfmt(void)
 {
-	return register_binfmt(&som_format);
+	register_binfmt(&som_format);
+	return 0;
 }
 
 static void __exit exit_som_binfmt(void)