Fix documentation about size of interval type.

It's been 16 bytes, not 12, for ages.  This was fixed in passing in HEAD
(commit 146604ec), but as a factual error it should have been back-patched.
Per gripe from Tatsuhito Kasahara.

diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml
index 2e74dbf94e3d70f5812660ecbba5373031256fcc..529d4920350813f4120e3e8c894ba9ece7f19aba 100644 (file)
--- a/doc/src/sgml/datatype.sgml
+++ b/doc/src/sgml/datatype.sgml
@@ -1587,7 +1587,7 @@ SELECT E'\\xDEADBEEF';
        
        
         interval [ fields ] [ (p) ]
-        12 bytes
+        16 bytes
         time interval
         -178000000 years
         178000000 years