IO: amend ImGuiPlatformIO::ClearPlatformHandlers(), ClearRendererHandlers(). (#8945, #2769)

imgui.cpp

@@ -16228,17 +16228,31 @@ void ImGuiPlatformIO::ClearPlatformHandlers()
 {
     Platform_GetClipboardTextFn = NULL;
     Platform_SetClipboardTextFn = NULL;
-    Platform_ClipboardUserData = NULL;
     Platform_OpenInShellFn = NULL;
-    Platform_OpenInShellUserData = NULL;
     Platform_SetImeDataFn = NULL;
-    Platform_ImeUserData = NULL;
+    Platform_ClipboardUserData = Platform_OpenInShellUserData = Platform_ImeUserData = NULL;
+    Platform_CreateWindow = Platform_DestroyWindow = Platform_ShowWindow = NULL;
+    Platform_SetWindowPos = Platform_SetWindowSize = NULL;
+    Platform_GetWindowPos = Platform_GetWindowSize = Platform_GetWindowFramebufferScale = NULL;
+    Platform_SetWindowFocus = NULL;
+    Platform_GetWindowFocus = Platform_GetWindowMinimized = NULL;
+    Platform_SetWindowTitle = NULL;
+    Platform_SetWindowAlpha = NULL;
+    Platform_UpdateWindow = NULL;
+    Platform_RenderWindow = Platform_SwapBuffers = NULL;
+    Platform_GetWindowDpiScale = NULL;
+    Platform_OnChangedViewport = NULL;
+    Platform_GetWindowWorkAreaInsets = NULL;
+    Platform_CreateVkSurface = NULL;
 }
 
 void ImGuiPlatformIO::ClearRendererHandlers()
 {
     Renderer_TextureMaxWidth = Renderer_TextureMaxHeight = 0;
     Renderer_RenderState = NULL;
+    Renderer_CreateWindow = Renderer_DestroyWindow = NULL;
+    Renderer_SetWindowSize = NULL;
+    Renderer_RenderWindow = Renderer_SwapBuffers = NULL;
 }
 
 ImGuiViewport* ImGui::GetMainViewport()