Crash when terminal gets resized

[amosbird]

tfg doesn't handle SIGWINCH correctly.

Traceback (most recent call last):
  File "/tmp/toolchain/bin/tfg/browser/terminal.py", line 93, in _draw_frame
    self._win.addstr(y, vf.x, vf.text, attrs)
_curses.error: addwstr() returned ERR

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/toolchain/bin/tfg.py", line 7, in <module>
    main()
  File "/tmp/toolchain/bin/tfg/main.py", line 70, in main
    process_args(parser.parse_args())
  File "/tmp/toolchain/bin/tfg/main.py", line 39, in process_args
    browser.display()
  File "/tmp/toolchain/bin/tfg/browser/terminal.py", line 274, in display
    curses.wrapper(self._display)
  File "/tmp/toolchain/lib/python3.6/curses/__init__.py", line 94, in wrapper
    return func(stdscr, *args, **kwds)
  File "/tmp/toolchain/bin/tfg/browser/terminal.py", line 290, in _display
    win.draw()
  File "/tmp/toolchain/bin/tfg/browser/terminal.py", line 75, in draw
    self._draw_frame(vf, y)
  File "/tmp/toolchain/bin/tfg/browser/terminal.py", line 96, in _draw_frame
    cer, vf.x, y, vf.text))
tfg.browser.terminal.BrowserException: error: addwstr() returned ERR, x: 0, y: 44, text: all