Added missing IMGUI_API to GetViewportPlatformMonitor. (#4309)

imgui_internal.h

@@ -2585,11 +2585,11 @@ namespace ImGui
     IMGUI_API void          CallContextHooks(ImGuiContext* context, ImGuiContextHookType type);
 
     // Viewports
-    IMGUI_API void                  TranslateWindowsInViewport(ImGuiViewportP* viewport, const ImVec2& old_pos, const ImVec2& new_pos);
-    IMGUI_API void                  ScaleWindowsInViewport(ImGuiViewportP* viewport, float scale);
-    IMGUI_API void                  DestroyPlatformWindow(ImGuiViewportP* viewport);
-    IMGUI_API void                  SetCurrentViewport(ImGuiWindow* window, ImGuiViewportP* viewport);
-    const ImGuiPlatformMonitor*     GetViewportPlatformMonitor(ImGuiViewport* viewport);
+    IMGUI_API void          TranslateWindowsInViewport(ImGuiViewportP* viewport, const ImVec2& old_pos, const ImVec2& new_pos);
+    IMGUI_API void          ScaleWindowsInViewport(ImGuiViewportP* viewport, float scale);
+    IMGUI_API void          DestroyPlatformWindow(ImGuiViewportP* viewport);
+    IMGUI_API void          SetCurrentViewport(ImGuiWindow* window, ImGuiViewportP* viewport);
+    IMGUI_API const ImGuiPlatformMonitor* GetViewportPlatformMonitor(ImGuiViewport* viewport);
 
     // Settings
     IMGUI_API void                  MarkIniSettingsDirty();