Fix bug #18384 with incorrect reporting of row number by posn-col-row.
lisp/subr.el (posn-col-row): Revert the change from commit
2010-11-13T21:07:58Z!eliz@gnu.org, which
was inadvertently merged from emacs-23 release branch in
2010-11-18T03:54:14Z!monnier@iro.umontreal.ca, and
introduced an off-by-one error in the reported row when there is a
header line.
src/dispnew.c (buffer_posn_from_coords): Fix an off-by-one error in
the reported row in the case of a window with a header line, by
improving on the fix committed in 2011-10-08T10:58:50Z!eliz@gnu.org
eliz@gnu.org-
20111008105850-ht4tvsayohvr1kjc.