Viewport: Fix handling of PlatformRequestResize/PlatformRequestPos. when OS decoration are enabled via ImGuiConfigFlags_ViewportsDecoration .

imgui.cpp

@@ -7687,8 +7687,10 @@ ImGuiViewportP* ImGui::AddUpdateViewport(ImGuiWindow* window, ImGuiID id, const
     ImGuiViewportP* viewport = (ImGuiViewportP*)FindViewportByID(id);
     if (viewport)
     {
-        viewport->Pos = pos;
+        if (!viewport->PlatformRequestMove)
-        viewport->Size = size;
+            viewport->Pos = pos;
+        if (!viewport->PlatformRequestResize)
+            viewport->Size = size;
     }
     else
     {