fix non-srtp build

src/voip/mediastream.c

@@ -27,6 +27,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include "ortp/ortp_srtp.h"
 #include "ortp/b64.h"
 
+#ifdef ORTP_HAVE_SRTP
 #if defined(ANDROID) || defined(WINAPI_FAMILY_PHONE_APP)
 // Android and Windows phone don't use make install
 #include <srtp_priv.h>
@@ -34,6 +35,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include <srtp/srtp_priv.h>
 #endif
 
+#endif /*ORTP_HAVE_SRTP*/
+
 #include <ctype.h>
 
 #ifndef MS_MINIMAL_MTU
@@ -43,7 +46,6 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #endif
 
 
-
 #if defined(_WIN32_WCE)
 time_t
 ms_time(time_t *t) {