[trivial PATCH 13/22] [otp_pw_valid.c] eliminate build warnings

[Wang Tinggong]

Signed-off-by: Wang Tinggong <wangtinggong at gmail.com>
---
 src/modules/rlm_otp/otp_pw_valid.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/modules/rlm_otp/otp_pw_valid.c b/src/modules/rlm_otp/otp_pw_valid.c
index d05516f..e5ff630 100644
--- a/src/modules/rlm_otp/otp_pw_valid.c
+++ b/src/modules/rlm_otp/otp_pw_valid.c
@@ -71,7 +71,7 @@ static pthread_mutex_t otp_fd_head_mutex = PTHREAD_MUTEX_INITIALIZER;
  * NB: The returned passcode will contain the PIN!  DO NOT LOG!
  */
 int
-otp_pw_valid(REQUEST *request, int pwe, const char *challenge,
+otp_pw_valid(REQUEST *request, int pwe, const unsigned char *challenge,
              const otp_option_t *opt, char passcode[OTP_MAX_PASSCODE_LEN + 1])
 {
   otp_request_t	otp_request;
@@ -88,7 +88,7 @@ otp_pw_valid(REQUEST *request, int pwe, const char *challenge,
 
   otp_request.version = 2;
   (void) strcpy(otp_request.username, username);
-  (void) strcpy(otp_request.challenge, challenge);
+  (void) strcpy(otp_request.challenge, (const char*)challenge);
   otp_request.pwe.pwe = pwe;
 
   /* otp_pwe_present() (done by caller) guarantees that both of these exist */
-- 
1.6.0.6