Fixed minor typo in example

README.md

@@ -54,7 +54,7 @@ Gallery
 ImGui can load TTF fonts. UTF-8 is supported for text display and input. Here using Arial Unicode font to display Japanese. Initialize custom font with:
 ```
 ImGuiIO& io = ImGui::GetIO();
-io.Fonts->AddFontFromFileTTF("ArialUni.ttf", 18.0f, io.Fonts->GetGlyphRangesJapanese());
+io.Fonts->AddFontFromFileTTF("ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
 ```
 For Microsoft IME, pass your HWND to enable IME positioning:
 ```