mark defos as const; nobody needs to change it,

and it is occasionally useful to be able to pass literal strings

1 files changed, 2 insertions, 2 deletions

diff --git a/read.c b/read.c
index dd25696c..20fa2640 100644
--- a/read.c
+++ b/read.c
@@ -65,7 +65,7 @@ struct	mparse {
 	mandocmsg	  mmsg; /* warning/error message handler */
 	const char	 *file;
 	struct buf	 *secondary;
-	char		 *defos; /* default operating system */
+	const char	 *defos; /* default operating system */
 };
 
 static	void	  resize_buf(struct buf *, size_t);
@@ -781,7 +781,7 @@ out:
 
 struct mparse *
 mparse_alloc(int options, enum mandoclevel wlevel,
-		mandocmsg mmsg, char *defos)
+		mandocmsg mmsg, const char *defos)
 {
 	struct mparse	*curp;