receiptomatic-www: Pass the proc title in as a const
receiptomatic-www: Pass the proc title in as a const

In set_proc_title() pass in the title string as a const char *, as this
string itself isn't being changed.

Signed-off-by: Andrew Clayton <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@opentechlabs.co.uk>

ac000/receiptomatic