security-events: Fix SuccessfulAuth using_password declaration.

The SuccessfulAuth using_password field was declared as a pointer to a
uint32_t when the field was later read as a uint32_t value.  This resulted
in unnecessary casts and a non-portable field value reinterpret in
main/security_events.c:add_json_object().  i.e., It would work on a 32 bit
architecture but not on a 64 bit big endian architecture.

Change-Id: Ia08bc797613a62f07e5473425f9ccd8d77c80935

res/res_pjsip/security_events.c

@@ -186,7 +186,7 @@ void ast_sip_report_auth_success(struct ast_sip_endpoint *endpoint, pjsip_rx_dat
 					.transport  = transport,
 			},
 			.common.session_id  = call_id,
-			.using_password     = auth ? (uint32_t *)1 : (uint32_t *)0,
+			.using_password     = auth ? 1 : 0,
 	};
 
 	security_event_populate(rdata, call_id, sizeof(call_id), &local, &remote);