urgh, fixup move ordering issue

Summary:
I changed this around at the last minute before landing D5896494 and
it seemed to work, but the optimized build is pretty consistent at falling over
at runtime with a zero page non-null address.

Reviewed By: bolinfest

Differential Revision: D6092224

fbshipit-source-id: 93448615ac3bbea30bfe7729085808d9926f7dab

eden/fs/inodes/EdenMount.cpp

@@ -107,7 +107,7 @@ class JournalDiffCallback : public InodeDiffCallback {
             rawContext,
             RelativePathPiece{},
             std::move(rootTree),
-            diffContext->getToplevelIgnore(),
+            rawContext->getToplevelIgnore(),
             false)
         .ensure([diffContext = std::move(diffContext)]() {});
   }