Fix no overwrite alert on Windows if there are capitalization differences (#18375)

distribution/changelog.txt

@@ -18,6 +18,7 @@
 - Fix: [#18122] Ghosts count towards “Great scenery!” guest thought.
 - Fix: [#18134] Underground on-ride photo section partially clips through adjacent terrain edge.
 - Fix: [#18257] Guests ‘waiting’ on extended railway crossings.
+- Fix: [#18354] Overwrite alert does not show when save name has different casing on Windows.
 - Fix: [#18379] Tunnel entrances for underground Mini Golf Hole E are not rendered correctly.
 
 0.4.2 (2022-10-05)

src/openrct2-ui/windows/LoadSave.cpp

@@ -20,6 +20,7 @@
 #include <openrct2/GameState.h>
 #include <openrct2/PlatformEnvironment.h>
 #include <openrct2/config/Config.h>
+#include <openrct2/core/File.h>
 #include <openrct2/core/FileScanner.h>
 #include <openrct2/core/Guard.hpp>
 #include <openrct2/core/Path.hpp>
@@ -570,8 +571,6 @@ static void WindowLoadsaveScrollmouseover(rct_window* w, int32_t scrollIndex, co
 
 static void WindowLoadsaveTextinput(rct_window* w, WidgetIndex widgetIndex, char* text)
 {
-    bool overwrite;
-
     if (text == nullptr || text[0] == 0)
         return;
 
@@ -608,17 +607,7 @@ static void WindowLoadsaveTextinput(rct_window* w, WidgetIndex widgetIndex, char
             const u8string path = Path::WithExtension(
                 Path::Combine(_directory, text), RemovePatternWildcard(_extensionPattern));
 
-            overwrite = false;
-            for (auto& item : _listItems)
-            {
-                if (String::Equals(item.path, path))
-                {
-                    overwrite = true;
-                    break;
-                }
-            }
-
-            if (overwrite)
+            if (File::Exists(path))
                 WindowOverwritePromptOpen(text, path.c_str());
             else
                 WindowLoadsaveSelect(w, path.c_str());