take a const pointer in refstrbind

This function does not modify its string argument, so it is more accurate to
qualify it as const. Related to #634.

diff --git a/lib/cgraph/refstr.c b/lib/cgraph/refstr.c
index d3317065d7d70c8abbfa1618725230e61d341aac..a534618226cb5687e062a16b1b95585b76a1db08 100644 (file)
--- a/lib/cgraph/refstr.c
+++ b/lib/cgraph/refstr.c
@@ -79,7 +79,7 @@ static refstr_t *refsymbind(Dict_t * strdict, const char *s)
     return r;
 }
 
-static char *refstrbind(Dict_t * strdict, char *s)
+static char *refstrbind(Dict_t * strdict, const char *s)
 {
     refstr_t *r;
     r = refsymbind(strdict, s);