Re: Fix typo about WalSndPrepareWrite

The following review has been posted through the commitfest application:
make installcheck-world:  tested, passed
Implements feature:       tested, passed
Spec compliant:           tested, passed
Documentation:            tested, passed

Hi,

thanks for the patch, however I don't think it is a typo. The comment indicates a technique that is used throughout
manyfunctions in walsender.c, which is to fill the send-timestamp as late as possible so it is more accurate. This is
doneby first reserving a spot in the write stream, write the actual data, and then finally write the current timestamp
tothe reserved spot. This technique is used in WalSndWriteData() and also XLogSendPhysical()... so really it doesn't
matterwhich function name to put in the comment.
 

thank you!

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Cary Huang
HighGo Software (Canada)