src: Fix argument order in ssh_channel_pty_window_change_callback
src: Fix argument order in ssh_channel_pty_window_change_callback

So that it would match ssh_channel_pty_request_callback as well as the documentation

Signed-off-by: Audrius Butkevicius <f90e40bb91d386c08b3311f23196fd604c51ee0f@gmail.com>
Reviewed-by: Andreas Schneider <5be00ddc76278cf6077f5047ca3384a88460c671@cryptomilk.org>

mwgoldsmith/ssh,mwgoldsmith/libssh,mwgoldsmith/ssh,mwgoldsmith/libssh,mwgoldsmith/libssh,mwgoldsmith/libssh,mwgoldsmith/ssh,mwgoldsmith/ssh