Re: [PATCH v2 12/22] tree-diff.c: move S_DIFFTREE_IFXMIN_NEQ define from cache.h

Ævar Arnfjörð Bjarmason [off-list ref] writes:

quoted

+#define S_DIFFTREE_IFXMIN_NEQ	0x80000000
+
 /*
  * internal mode marker, saying a tree entry != entry of tp[imin]
  * (see ll_diff_tree_paths for what it means there)

As it's only used in tree-diff.c, should this change not be instead
changing how we define S_IFXMIN_NEQ itself, and combining the two
comments seen here (the latter only partially, in the context).

Yup, the end result should look cleaner with this extra bit of
tweak.  Thanks for carefully reading the patch.