Use REGBUF_NO_CHANGE at one more place in the hash index.
Commit
00d7fb5e2e started to use REGBUF_NO_CHANGE at a few places in the
code where we register the buffer before marking it dirty but missed
updating one of the code flows in the hash index where we free the overflow
page without any live tuples on it.
Author: Amit Kapila and Hayato Kuroda
Discussion: http://postgr.es/m/
f045c8f7-ee24-ead6-3679-
c04a43d21351@gmail.com