[age restriction] progress 11/n

Parse age restriction information from "/keys"
- parse "age_restriction" extension, extract mask for age groups
- parse denominations from "age_restricted_denoms", too, if available

1 files changed, 1 insertions, 1 deletions

diff --git a/src/util/extension_age_restriction.c b/src/util/extension_age_restriction.c
index 42a58b2e9..b29a8ca88 100644
--- a/src/util/extension_age_restriction.c
+++ b/src/util/extension_age_restriction.c
@@ -80,7 +80,7 @@ TALER_get_age_mask (const struct GNUNET_CONFIGURATION_Handle *cfg,
  * @return Error if string was invalid, OK otherwise.
  */
 enum TALER_Extension_ReturnValue
-TALER_parse_age_group_string (char *groups,
+TALER_parse_age_group_string (const char *groups,
                               struct TALER_AgeMask *mask)
 {
   enum TALER_Extension_ReturnValue ret = TALER_Extension_ERROR_SYS;