enable speex vad

configure.ac

 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT([linphone],[3.3.99.4],[linphone-developers@nongnu.org])
+AC_INIT([linphone],[3.3.99.5],[linphone-developers@nongnu.org])
 AC_CANONICAL_SYSTEM
 AC_CONFIG_SRCDIR([coreapi/linphonecore.c])
 

coreapi/linphonecore.c

@@ -936,8 +936,8 @@ static void linphone_core_init (LinphoneCore * lc, const LinphoneCoreVTable *vta
 	linphone_core_assign_payload_type(&payload_type_gsm,3,NULL);
 	linphone_core_assign_payload_type(&payload_type_pcma8000,8,NULL);
 	linphone_core_assign_payload_type(&payload_type_lpc1015,115,NULL);
-	linphone_core_assign_payload_type(&payload_type_speex_nb,110,"vbr=on");
-	linphone_core_assign_payload_type(&payload_type_speex_wb,111,"vbr=on");
+	linphone_core_assign_payload_type(&payload_type_speex_nb,110,"vbr=vad");
+	linphone_core_assign_payload_type(&payload_type_speex_wb,111,"vbr=vad");
 	linphone_core_assign_payload_type(&payload_type_speex_uwb,112,"vbr=on");
 	linphone_core_assign_payload_type(&payload_type_telephone_event,101,"0-11");
 	linphone_core_assign_payload_type(&payload_type_ilbc,113,"mode=30");