finally isolated the _important_ difference between Romano Trampus's
working printing.c and my failing one: he ignores the error return
from the first exploratory how-big-does-my-buffer-need-to-be call to
EnumPrinters(), because not having enough buffer space counts as an
error condition. Hence I am officially a klutz, but this should now
work. (Also reverted ENUM_LEVEL to 1, again, because that seems to
be the choice of people whose code works.)
[originally from svn r1915]
specifying both PRINTER_ENUM_LOCAL and PRINTER_ENUM_CONNECTIONS
catches more printers in some circumstances than two EnumPrinters()
calls each specifying just one of them. We'll try it for a bit; if
it goes wrong I might have to put back the two original calls as
well and sort out some means of removing duplicate printers from the
list.
[originally from svn r1829]
