Fix regression for VST3 editor initial sizing

We accidentally reverted a little bit too much code in
762e622416. This didn't appear any sooner
because plugins are supposed to call `IPlugFrame::resizeView()` during
`IPlugView::attached()`, so this only affects plugins that don't confirm
to the spec.

CHANGELOG.md

@@ -6,6 +6,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic
 Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Fixed a regression from yabridge 3.5.1 where certain non-standard compliant
+  VST3 plugins wouldn't resize to their correct size when opening the editor.
+  This affects **Kontakt**, and it was caused by reverting just a little bit too
+  much code in the regression fix from the previous release.
+
 ## [3.5.1] - 2021-06-31
 
 ### Added

src/wine-host/bridges/vst3.cpp

@@ -739,9 +739,17 @@ void Vst3Bridge::run() {
                                 editor_instance.get_win32_handle(),
                                 type.c_str());
 
-                        // Get rid of the editor again if the plugin didn't
-                        // embed itself in it
-                        if (result != Steinberg::kResultOk) {
+                        // Set the window's initial size according to what the
+                        // plugin reports. Otherwise get rid of the editor again
+                        // if the plugin didn't embed itself in it.
+                        if (result == Steinberg::kResultOk) {
+                            Steinberg::ViewRect size{};
+                            if (instance.plug_view_instance->plug_view->getSize(
+                                    &size) == Steinberg::kResultOk) {
+                                instance.editor->resize(size.getWidth(),
+                                                        size.getHeight());
+                            }
+                        } else {
                             instance.editor.reset();
                         }