FS-6535 --resolve mod_rayo: allow multiple grammars (including dtmf) when using unimrcp

src/include/switch_ivr.h

@@ -238,7 +238,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_resume_detect_speech(switch_core_sess
   \param name the grammar name
   \return SWITCH_STATUS_SUCCESS if all is well
 */
-SWITCH_DECLARE(switch_status_t) switch_ivr_detect_speech_load_grammar(switch_core_session_t *session, char *grammar, char *name);
+SWITCH_DECLARE(switch_status_t) switch_ivr_detect_speech_load_grammar(switch_core_session_t *session, const char *grammar, const char *name);
 
 /*!
   \brief Unload a grammar on a background speech detection handle

src/switch_ivr_async.c

@@ -4042,7 +4042,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_resume_detect_speech(switch_core_sess
 	return SWITCH_STATUS_FALSE;
 }
 
-SWITCH_DECLARE(switch_status_t) switch_ivr_detect_speech_load_grammar(switch_core_session_t *session, char *grammar, char *name)
+SWITCH_DECLARE(switch_status_t) switch_ivr_detect_speech_load_grammar(switch_core_session_t *session, const char *grammar, const char *name)
 {
 	switch_channel_t *channel = switch_core_session_get_channel(session);
 	struct speech_thread_handle *sth = switch_channel_get_private(channel, SWITCH_SPEECH_KEY);