smart plugin: constify

diff --git a/src/smart.c b/src/smart.c
index 2207bd6..7b39aae 100644 (file)
--- a/src/smart.c
+++ b/src/smart.c
@@ -68,7 +68,8 @@ static int smart_config (const char *key, const char *value)
   return (0);
 } /* int smart_config */
 
-static void smart_submit (const char *dev, char *type, char *type_inst, double value)
+static void smart_submit (const char *dev, const char *type,
+               const char *type_inst, double value)
 {
        value_t values[1];
        value_list_t vl = VALUE_LIST_INIT;