mg(1) onlywind() line number anomaly

[Mark Lumsden]

If you open mg with only the *scratch* buffer loaded (no file names
given on command line), and press enter 5 times, take a note of the
line number in the status bar then open theo mode (M-x theo). Then
move back to the *scratch* buffer via switch-to-buffer (C-x b). You'll
notice the line number of the *scratch* buffer is now 1, though the
cursor is on line 5. theo mode is initally opened splitting the screen
in two, then onlywind() is called. The bug is in onlywind(). This diff
fixes this behavior. ok? 

-lum

Index: window.c
===================================================================
RCS file: /cvs/src/usr.bin/mg/window.c,v
retrieving revision 1.33
diff -u -p -u -p -r1.33 window.c
--- window.c    25 Mar 2015 20:53:31 -0000      1.33
+++ window.c    8 Oct 2015 19:49:34 -0000
@@ -167,6 +167,8 @@ onlywind(int f, int n)
                        wp->w_bufp->b_doto = wp->w_doto;
                        wp->w_bufp->b_markp = wp->w_markp;
                        wp->w_bufp->b_marko = wp->w_marko;
+                       wp->w_bufp->b_dotline = wp->w_dotline;
+                       wp->w_bufp->b_markline = wp->w_markline;
                }
                free(wp);
        }
@@ -178,6 +180,8 @@ onlywind(int f, int n)
                        wp->w_bufp->b_doto = wp->w_doto;
                        wp->w_bufp->b_markp = wp->w_markp;
                        wp->w_bufp->b_marko = wp->w_marko;
+                       wp->w_bufp->b_dotline = wp->w_dotline;
+                       wp->w_bufp->b_markline = wp->w_markline;
                }
                free(wp);
        }