GitLab

 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.