tmux(1): fix resize-pane -y error message

[Kris Katterjohn]

Hey,

A small diff is below to fix the error message from tmux(1) when an
invalid value is passed to resize-pane -y.  It has mentioned "width"
instead of "height".

Cheers,
Kris Katterjohn

Index: usr.bin/tmux/cmd-resize-pane.c
===================================================================
RCS file: /cvs/src/usr.bin/tmux/cmd-resize-pane.c,v
retrieving revision 1.47
diff -u -p -r1.47 cmd-resize-pane.c
--- usr.bin/tmux/cmd-resize-pane.c      16 May 2020 15:01:30 -0000      1.47
+++ usr.bin/tmux/cmd-resize-pane.c      23 May 2020 19:12:45 -0000
@@ -117,7 +117,7 @@ cmd_resize_pane_exec(struct cmd *self, s
        if (args_has(args, 'y')) {
                y = args_percentage(args, 'y', 0, INT_MAX, w->sy, &cause);
                if (cause != NULL) {
-                       cmdq_error(item, "width %s", cause);
+                       cmdq_error(item, "height %s", cause);
                        free(cause);
                        return (CMD_RETURN_ERROR);
                }