Unify exception handling style

src/plugin/bridges/vst2.cpp

@@ -536,7 +536,7 @@ intptr_t Vst2PluginBridge::dispatch(AEffect* /*plugin*/,
                 return_value = sockets.host_vst_dispatch.send_event(
                     converter, std::pair<Vst2Logger&, bool>(logger, true),
                     opcode, index, value, data, option);
-            } catch (const boost::system::system_error& a) {
+            } catch (const boost::system::system_error&) {
                 // Thrown when the socket gets closed because the VST plugin
                 // loaded into the Wine process crashed during shutdown
                 logger.log("The plugin crashed during shutdown, ignoring");

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

@@ -217,7 +217,7 @@ Vst3PlugViewProxyImpl::setFrame(Steinberg::IPlugFrame* frame) {
         // try to call those functions from an `IRunLoop` event handler.
         try {
             run_loop_tasks.emplace(plug_frame);
-        } catch (const std::runtime_error& e) {
+        } catch (const std::runtime_error& error) {
             // In case the host does not support `IRunLoop` or if we can't
             // register an event handler, we'll throw during `RunLoopTasks`'
             // constructor
@@ -226,7 +226,7 @@ Vst3PlugViewProxyImpl::setFrame(Steinberg::IPlugFrame* frame) {
             bridge.logger.log(
                 "The host does not support IRunLoop, falling back to naive GUI "
                 "function execution: " +
-                std::string(e.what()));
+                std::string(error.what()));
         }
 
         return bridge.send_mutually_recursive_message(YaPlugView::SetFrame{