Add const attributes to fix gcc -Wwrite-strings warnings

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/xpr.c b/xpr.c
index cdc2143..0e75400 100644
--- a/xpr.c
+++ b/xpr.c
@@ -131,8 +131,8 @@ int debug = 0;
 
 #define DEFAULT_CUTOFF ((unsigned int) (0xFFFF * 0.50))
 
-static char *infilename = NULL;
-char *progname   = NULL;
+static const char *infilename = NULL;
+const char *progname   = NULL;
 
 typedef struct _grayRec {
     int level;