Add explicit virtual default destructors

We need to silence the warning about this because Steinberg doesn't
declare their base class destructors as virtual (because of Windows ABI
compatibility issues). But we can still do it inside of yabridge to have
at least a bit more safety.

src/plugin/bridges/common.h

@@ -129,7 +129,7 @@ class PluginBridge {
               io_context_.run();
           }) {}
 
-    virtual ~PluginBridge() noexcept {};
+    virtual ~PluginBridge() noexcept = default;
 
    protected:
     /**

src/plugin/bridges/vst3-impls/plug-view-proxy.h

@@ -49,7 +49,7 @@ class RunLoopTasks : public Steinberg::Linux::IEventHandler {
     /**
      * Unregister the event handler and close the file descriptor on cleanup.
      */
-    ~RunLoopTasks();
+    virtual ~RunLoopTasks();
 
     DECLARE_FUNKNOWN_METHODS
 

src/plugin/bridges/vst3-impls/plugin-proxy.cpp

@@ -390,6 +390,7 @@ Vst3PluginProxyImpl::getBusInfo(Steinberg::Vst::MediaType type,
 }
 
 tresult PLUGIN_API Vst3PluginProxyImpl::getRoutingInfo(
+    // NOLINTNEXTLINE(bugprone-easily-swappable-parameters)
     Steinberg::Vst::RoutingInfo& inInfo,
     Steinberg::Vst::RoutingInfo& outInfo /*out*/) {
     const GetRoutingInfoResponse response =

src/plugin/host-process.cpp

@@ -25,8 +25,6 @@ namespace fs = ghc::filesystem;
 HostProcess::HostProcess(asio::io_context& io_context, Sockets& sockets)
     : sockets_(sockets), stdout_pipe_(io_context), stderr_pipe_(io_context) {}
 
-HostProcess::~HostProcess() noexcept {}
-
 Process::Handle HostProcess::launch_host(
     const ghc::filesystem::path& host_path,
     std::initializer_list<std::string> args,

src/plugin/host-process.h

@@ -37,7 +37,7 @@
  */
 class HostProcess {
    public:
-    virtual ~HostProcess() noexcept;
+    virtual ~HostProcess() noexcept = default;
 
     /**
      * Return the full path to the host application in use. The host application