Dir.makeOpenPathAccessMaskW: Fix leaking intermediate directory handles

Fixes a regression introduced in 67455c5e70. The `errdefer` cannot run since its not possible for an error to occur, and we don't want it to run on the last handle, so we move the closing back down to where it was before 67455c5e70.

lib/std/fs/Dir.zig

@@ -1217,10 +1217,13 @@ fn makeOpenPathAccessMaskW(self: Dir, sub_path: []const u8, access_mask: u32, no
             },
             else => |e| return e,
         };
-        // Don't leak the intermediate file handles
-        errdefer if (result) |*dir| dir.close();
 
         component = it.next() orelse return result.?;
+
+        // Don't leak the intermediate file handles
+        if (result) |*dir| {
+            dir.close();
+        }
     }
 }