OpenGL: Allow setting window bounds from repaint callback

On Windows, the OpenGL context window sometimes receives a repaint
request after moving between screens with different scale factors.
If the screen has changed size/scale since the last paint operation,
failing to invalidate the painted area may cause the screen contents
to be drawn at the wrong scale until paint is next called.

modules/juce_audio_plugin_client/VST/juce_VST_Wrapper.cpp

@@ -68,6 +68,7 @@ JUCE_BEGIN_IGNORE_WARNINGS_MSVC (4996 4100)
 JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wconversion",
                                      "-Wshadow",
                                      "-Wdeprecated-register",
+                                     "-Wdeprecated-declarations",
                                      "-Wunused-parameter",
                                      "-Wdeprecated-writable-strings",
                                      "-Wnon-virtual-dtor",

modules/juce_opengl/opengl/juce_OpenGLContext.cpp

@@ -214,7 +214,7 @@ public:
     //==============================================================================
     void paint (Graphics&) override
     {
-        updateViewportSize (false);
+        updateViewportSize();
     }
 
     bool invalidateAll() override
@@ -352,7 +352,7 @@ public:
         return true;
     }
 
-    void updateViewportSize (bool canTriggerUpdate)
+    void updateViewportSize()
     {
         JUCE_ASSERT_MESSAGE_THREAD
 
@@ -400,9 +400,7 @@ public:
                                                     (float) newArea.getHeight() / (float) localBounds.getHeight());
 
                 nativeContext->updateWindowPosition (peer->getAreaCoveredBy (component));
-
-                if (canTriggerUpdate)
-                    invalidateAll();
+                invalidateAll();
             });
         }
     }
@@ -420,7 +418,7 @@ public:
 
         if (lastScreenBounds != screenBounds)
         {
-            updateViewportSize (true);
+            updateViewportSize();
             lastScreenBounds = screenBounds;
         }
     }
@@ -523,7 +521,7 @@ public:
 
     void handleResize()
     {
-        updateViewportSize (true);
+        updateViewportSize();
 
        #if JUCE_MAC
         if (hasInitialised)
@@ -1052,7 +1050,7 @@ private:
         if (auto* cachedImage = CachedImage::get (comp))
         {
             cachedImage->start(); // (must wait until this is attached before starting its thread)
-            cachedImage->updateViewportSize (true);
+            cachedImage->updateViewportSize();
 
             startTimer (400);
         }