For issue #3816 ("file external can cause mixed-revision working copy after checkout"), exclude file externals from the min-and-max-revision range query.
For issue #3816 ("file external can cause mixed-revision working copy
after checkout"), exclude file externals from the min-and-max-revision
range query.

* subversion/libsvn_wc/wc-queries.sql
  (STMT_SELECT_MIN_MAX_REVISIONS): Only match nodes with NULL
    'file_external' columns.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1076752 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion