Added explicit defaulted public destructors to device lists.

Pcap++/header/DpdkDeviceList.h

@@ -98,6 +98,8 @@ namespace pcpp
 		static int dpdkWorkerThreadStart(void* ptr);
 
 	public:
+		~DpdkDeviceList() = default;
+
 		/**
 		 * As DpdkDeviceList is a singleton, this is the static getter to retrieve its instance. Note that if the static
 		 * method initDpdk() was not called or returned false this instance won't be initialized and DpdkDevices won't

Pcap++/header/PcapLiveDeviceList.h

@@ -44,6 +44,7 @@ namespace pcpp
 		PcapLiveDeviceList(PcapLiveDeviceList&&) noexcept = delete;
 		PcapLiveDeviceList& operator=(const PcapLiveDeviceList&) = delete;
 		PcapLiveDeviceList& operator=(PcapLiveDeviceList&&) noexcept = delete;
+		~PcapLiveDeviceList() = default;
 
 		/**
 		 * The access method to the singleton

Pcap++/header/PcapRemoteDeviceList.h

@@ -69,6 +69,7 @@ namespace pcpp
 		PcapRemoteDeviceList(PcapRemoteDeviceList&&) noexcept = delete;
 		PcapRemoteDeviceList& operator=(const PcapRemoteDeviceList&) = delete;
 		PcapRemoteDeviceList& operator=(PcapRemoteDeviceList&&) noexcept = delete;
+		~PcapRemoteDeviceList() = default;
 
 		/**
 		 * A static method for creating a PcapRemoteDeviceList instance for a certain remote machine. This methods

Pcap++/header/PfRingDeviceList.h

@@ -35,6 +35,7 @@ namespace pcpp
 		PfRingDeviceList(PfRingDeviceList&&) noexcept = delete;
 		PfRingDeviceList& operator=(const PfRingDeviceList&) = delete;
 		PfRingDeviceList& operator=(PfRingDeviceList&&) noexcept = delete;
+		~PfRingDeviceList() = default;
 
 		/**
 		 * A static method that returns the singleton object for PfRingDeviceList