This fixes a small regression from commit eef32d13da.
* lisp/eshell/esh-proc.el (eshell-reset): Declare here.
(eshell-reset-after-proc): Move implementation to...
(eshell--reset-after-signal): ... here...
(eshell-interrupt-process, eshell-kill-process eshell-quit-process)
(eshell-stop-process, eshell-continue-process): ... and call it.