pg_dump should not try CREATE OR REPLACE LANGUAGE < 9.0

Subject line kind of says it all: LANGUAGE replacement was 
introduced in 9.0, but pg_dump is trying it on all versions.

-- 
Greg Sabino Mullane greg@turnstep.com
End Point Corporation
PGP Key: 0x14964AC8 201005121537
http://biglumber.com/x/web?pk=2529DF6AB8F79407E94445B4BC9B906714964AC8