pgsql: Prevent Win32 from displaying a popup box on backend crash.

Log Message:
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Prevent Win32 from displaying a popup box on backend crash. Instead let
the postmaster deal with it.

Magnus Hagander

Modified Files:
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pgsql/src/backend/main:
main.c (r1.101 -> r1.102)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/main/main.c.diff?r1=1.101&r2=1.102)