* net/tramp.el (tramp-handle-write-region): Improve the check for

* net/tramp.el (tramp-handle-write-region): Improve the check for
calling direct copy.
(tramp-find-inline-encoding): Don't raise an error but a warning,
when no inline encoding is found.
(tramp-get-remote-coding): Check for a symbol.  The negative check
for a string fails, when there is an empty string.