Change the naming scheme for class field members

I'm not a fan of Hungarian notation, but C++ kind of needs it with its
implicit `this`. And of all the common options for this, I find
suffixing members with an underscore the least offensive one.

src/wine-host/bridges/vst3-impls/connection-point-proxy.h

@@ -37,5 +37,5 @@ class Vst3ConnectionPointProxyImpl : public Vst3ConnectionPointProxy {
     tresult PLUGIN_API notify(Steinberg::Vst::IMessage* message) override;
 
    private:
-    Vst3Bridge& bridge;
+    Vst3Bridge& bridge_;
 };