'show create' works even on views that are short of a base-table (this
throw a warning though, like you would expect). Unfortunately, this is
not what mysqldump uses; it creates stand-in tables and hence requests
'show fields' on the view which fails with missing base-tables.  The
--force option prevents the dump from stopping at this point; furthermore
this patch dumps a comment showing create for the offending view for
better diagnostics. This solution was confirmed by submitter as solving
their/clients' problem. Problem might become non-issue once mysqldump no
longer creates stand-in tables.


client/mysqldump.c:
  Dump a comment showing create for a view if we can't show fields for it for
  better diagnostics.
mysql-test/r/mysqldump.result:
  add test for #17371 - be defensive. if we can't do a full dump on a view
  (incl. 'show fields' for a stand-in table), at least create a comment with
  the 'show create' info when --force is given.
mysql-test/t/mysqldump.test:
  add test for #17371 - be defensive. if we can't do a full dump on a view
  (incl. 'show fields' for a stand-in table), at least create a comment with
  the 'show create' info when --force is given.