fix compilation problem

fix documentation.

linphone/mediastreamer2/include/mediastreamer2/msticker.h

@@ -125,7 +125,9 @@ int ms_ticker_detach(MSTicker *ticker,MSFilter *f);
 void ms_ticker_destroy(MSTicker *ticker);
 
 /**
- * Destroy a ticker.
+ * Override MSTicker's time function.
+ * This can be used to control the ticker from an external time provider, for example the 
+ * clock of a sound card.
  *
  * @param ticker  A #MSTicker object.
  * @param func    A replacement method for calculating "current time"

linphone/mediastreamer2/src/mtu.c

@@ -180,10 +180,6 @@ int ms_discover_mtu(const char *host){
 	err=getaddrinfo(host,port,&hints,&ai);
 	if (err!=0){
 		ms_error("getaddrinfo(): %s\n",gai_strerror(err));
-		err = close(sock);
-		if (err!=0)
-			ms_error("close(): %s", strerror(err));
-
 		return -1;
 	}
 	sock=socket(PF_INET,SOCK_DGRAM,0);