Followup fix to r9991.
 
* libsvn_fs/fs.c (check_env_flags):  oops, get_flags is only available when
  compiling against db4.2 or greater.  This routine is only called when
  DB_LOG_AUTOREMOVE is defined so use that to compile out this routine.

Index: subversion/libsvn_fs_base/fs.c
===================================================================
--- subversion/libsvn_fs_base/fs.c      (revision 9993)
+++ subversion/libsvn_fs_base/fs.c      (working copy)
@@ -797,6 +797,7 @@
  
  
  
+#ifdef DB_LOG_AUTOREMOVE
 /* Open the BDB environment at PATH and compare its configuration
    flags with FLAGS.  If every flag in FLAGS is set in the
    environment, then set *MATCH to true.  Else set *MATCH to false. */
@@ -829,6 +830,7 @@
  
   return SVN_NO_ERROR;
 }
+#endif
  
  
 static svn_error_t *