On branch merge-skips-obstructions: Fix false positive in missing-node detection in dry_run merge.
On branch merge-skips-obstructions:
Fix false positive in missing-node detection in dry_run merge.

This fixes the test runs
merge_tests.py 32 35
revert_tests.py 6 15

* subversion/libsvn_client/merge.c
  (node_kind_working):
    Add MERGE_B argument. Use this to make assumptions about the working
    kind in case of a MERGE_B->dry_run.
  (obstructed_or_missing): Pass MERGE_B.



git-svn-id: 4e0086ae6b597b27d7883cb852f4571162c4d09b@874527 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion