Mild const-correctness improvements.

Only touch a few things, the main focus is to
improve code readability.

1 files changed, 2 insertions, 2 deletions

diff --git a/st.h b/st.h
index 7ea2fd3..99c14f2 100644
--- a/st.h
+++ b/st.h
@@ -93,7 +93,7 @@ void tnew(int, int);
 void tresize(int, int);
 void tsetdirtattr(int);
 void ttyhangup(void);
-int ttynew(char *, char *, char *, char **);
+int ttynew(const char *, char *, const char *, char **);
 size_t ttyread(void);
 void ttyresize(int, int);
 void ttywrite(const char *, size_t, int);
@@ -111,7 +111,7 @@ size_t utf8encode(Rune, char *);
 
 void *xmalloc(size_t);
 void *xrealloc(void *, size_t);
-char *xstrdup(char *);
+char *xstrdup(const char *);
 
 /* config.h globals */
 extern char *utmp;