fix strncpy usage

@@ -53,7 +53,8 @@ socketCtor(void * _this, va_list * params)
 	this->fin_state = TR_FIN_RDWR;
 
 	if (host) {
-		strncpy(this->host, host, TR_MAX_HOST);
+		this->host[TR_MAX_HOST-1] = 0;
+		strncpy(this->host, host, TR_MAX_HOST-1);
 	}
 
 	return 0;

@@ -94,7 +94,8 @@ TR_socketInit(TR_Socket this, TR_socketAction_fptr action)
 
 		//fcntl(this->handle, F_SETFL, flags | O_NONBLOCK);
 		if (current_info->ai_canonname) {
-			strncpy(this->cname, current_info->ai_canonname, TR_MAX_CNAME);
+			this->cname[TR_MAX_CNAME-1] = 0;
+			strncpy(this->cname, current_info->ai_canonname, TR_MAX_CNAME-1);
 		}
 		this->fin_state = TR_FIN_NO;