unixsock plugin: constify

diff --git a/src/unixsock.c b/src/unixsock.c
index 54a1e20..795f7ab 100644 (file)
--- a/src/unixsock.c
+++ b/src/unixsock.c
@@ -151,7 +151,7 @@ static int us_open_socket (void)
 
        do
        {
-               char *grpname;
+               const char *grpname;
                struct group *g;
                struct group sg;
                char grbuf[2048];