eliminate some compiler warnings

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@8443 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -469,7 +469,7 @@ struct sip_pkt;
 /*! \brief Parameters to the transmit_invite function */
 struct sip_invite_param {
 	const char *distinctive_ring;	/*!< Distinctive ring header */
-	char *osptoken;		/*!< OSP token for this call */
+	const char *osptoken;		/*!< OSP token for this call */
 	int addsipheaders;	/*!< Add extra SIP headers */
 	const char *uri_options;	/*!< URI options to add to the URI */
 	const char *vxml_url;		/*!< VXML url for Cisco phones */
@@ -1996,7 +1996,7 @@ static int sip_call(struct ast_channel *ast, char *dest, int timeout)
 	int res;
 	struct sip_pvt *p;
 #ifdef OSP_SUPPORT
-	char *osphandle = NULL;
+	const char *osphandle = NULL;
 #endif	
 	struct varshead *headp;
 	struct ast_var_t *current;

include/asterisk/astosp.h

@@ -43,6 +43,6 @@ int ast_osp_next(struct ast_osp_result *result, int cause);
 
 int ast_osp_terminate(int handle, int cause, time_t start, time_t duration);
 
-int ast_osp_validate(char *provider, char *token, int *handle, unsigned int *timeout, char *callerid, struct in_addr addr, char *extension);
+int ast_osp_validate(char *provider, char *token, int *handle, unsigned int *timeout, const char *callerid, struct in_addr addr, const char *extension);
 
 #endif /* _ASTERISK_OSP_H */

res/res_osp.c

@@ -452,7 +452,7 @@ static int loadPemPrivateKey(unsigned char *FileName, unsigned char *buffer, int
     return retVal;
 }
 
-int ast_osp_validate(char *provider, char *token, int *handle, unsigned int *timelimit, char *callerid, struct in_addr addr, char *extension)
+int ast_osp_validate(char *provider, char *token, int *handle, unsigned int *timelimit, const char *callerid, struct in_addr addr, const char *extension)
 {
 	char tmp[256]="", *l, *n;
 	char iabuf[INET_ADDRSTRLEN];