* src/poptalloca.h: New file with definitions for alloca. Note: alloca
is defined as malloc on systems which fail to support alloca. Don't
include this file if you frequently use alloca.
* src/findme.c, src/popt*.c: include poptalloca.h
* src/Makefile.in: added poptalloca.h
* src/menu.c (create_menu): set minimum menu width to 20 characters as
it used to be (this was part of davids patches but I haven't
applied it, yet).
