Fixed build (3e06450d27 not meant for master branch, but ok)

imgui.cpp

@@ -6014,7 +6014,9 @@ bool ImGui::ArrowButton(ImGuiID id, ImGuiDir dir, ImVec2 padding, ImGuiButtonFla
     bool pressed = ButtonBehavior(bb, id, &hovered, &held, flags);
 
     const ImU32 col = GetColorU32((hovered && held) ? ImGuiCol_ButtonActive : hovered ? ImGuiCol_ButtonHovered : ImGuiCol_Button);
+#ifdef IMGUI_HAS_NAV
     RenderNavHighlight(bb, id);
+#endif
     RenderFrame(bb.Min, bb.Max, col, true, style.FrameRounding);
     RenderTriangle(bb.Min + padding, dir, 1.0f);