Fix comment.

tatsuo-ishii · tatsuo-ishii · commit a282d1871c9b · 2017-08-01T08:08:54.000+09:00
XLByteToSeg and XLByteToPrevSeg calculate only a segment number. The definition of these macros were modified by commit dfda6eb but the comment remain unchanged. Patch by Yugo Nagata. Back patched to 9.3 and beyond.
diff --git a/src/include/access/xlog_internal.h b/src/include/access/xlog_internal.h
@@ -120,7 +120,7 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader;
 		(dest) = (segno) * XLOG_SEG_SIZE + (offset)
 
 /*
- * Compute ID and segment from an XLogRecPtr.
+ * Compute a segment number from an XLogRecPtr.
  *
  * For XLByteToSeg, do the computation at face value.  For XLByteToPrevSeg,
  * a boundary byte is taken to be in the previous segment.  This is suitable

Original file line number	Diff line number	Diff line change
`@@ -120,7 +120,7 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader;`
`120`	`120`	`(dest) = (segno) * XLOG_SEG_SIZE + (offset)`
`121`	`121`
`122`	`122`	`/*`
`123`		`- * Compute ID and segment from an XLogRecPtr.`
	`123`	`+ * Compute a segment number from an XLogRecPtr.`
`124`	`124`	`*`
`125`	`125`	`* For XLByteToSeg, do the computation at face value. For XLByteToPrevSeg,`
`126`	`126`	`* a boundary byte is taken to be in the previous segment. This is suitable`