Add include to fix compiling

Shoegzer · Triang3l · commit 4a2f4d9cfe28 · 2023-01-29T21:10:20.000+03:00
diff --git a/src/xenia/ui/imgui_drawer.h b/src/xenia/ui/imgui_drawer.h
@@ -13,6 +13,7 @@
 #include <cstddef>
 #include <cstdint>
 #include <memory>
+#include <optional>
 #include <vector>
 
 #include "xenia/ui/immediate_drawer.h"
