maint: avoid compiler warnings with some assert() implementations

* src/df.c (get_dev): asssert() on Solaris 10 is not marked as
__noreturn__ and thus the compiler may think V is uninitialized
later on in the function.
* THANKS.in: Remove the now committer.

THANKS.in

@@ -77,7 +77,6 @@ Barry Kelly                         http://barrkel.blogspot.com/
 Bauke Jan Douma                     bjdouma@xs4all.nl
 Ben Elliston                        bje@air.net.au
 Ben Harris                          bjh21@netbsd.org
-Ben Walton                          bwalton@artsci.utoronto.ca
 Bengt Martensson                    bengt@mathematik.uni-Bremen.de
 Benjamin Cutler                     cutlerbc@simla.colostate.edu
 Bernard Giroud                      bernard.giroud@creditlyonnais.ch

src/df.c

@@ -953,6 +953,7 @@ get_dev (char const *disk, char const *mount_point, char const* file,
           v = NULL;
           break;
         default:
+          v = NULL; /* Avoid warnings where assert() is not __noreturn__.  */
           assert (!"bad field_type");
         }