Update WindowsWallpaperService.cs

Author: 0x5bfa

src/Files.App/Services/Windows/WindowsWallpaperService.cs

@@ -63,10 +63,11 @@ public unsafe void SetDesktopSlideshow(string[] aszPaths)
 				(void**)pDesktopWallpaper.GetAddressOf())
 			.ThrowOnFailure();
 
+			uint dwCount = (uint)aszPaths.Length;
 			ITEMIDLIST** ppItemIdList = stackalloc ITEMIDLIST*[aszPaths.Length];
 
 			// Get array of PIDL from the selected image files
-			for (uint dwIndex = 0u; dwIndex < (uint)aszPaths.Length; dwIndex++)
+			for (uint dwIndex = 0u; dwIndex < dwCount; dwIndex++)
 				ppItemIdList[dwIndex] = PInvoke.ILCreateFromPath(aszPaths[dwIndex]);
 
 			// Get a shell array of the array of the PIDL
@@ -77,7 +78,7 @@ public unsafe void SetDesktopSlideshow(string[] aszPaths)
 			hr = pDesktopWallpaper.Get()->SetSlideshow(pShellItemArray.Get()).ThrowOnFailure();
 
 			// Free the allocated PIDL
-			for (uint dwIndex = 0u; dwIndex < (uint)aszPaths.Length; dwIndex++)
+			for (uint dwIndex = 0u; dwIndex < dwCount; dwIndex++)
 				PInvoke.ILFree(ppItemIdList[dwIndex]);
 
 			// Set wallpaper position to fill the monitor.