Buffer overflow when setting a really tiny font on terminal

[ricemiller]

Steps to reproduce:

• Open cmus in xterm.
• CTRL+Right click -> Set VT Font to "Unreadable".
• cmus forces exit, launching this error below:

* buffer overflow detected *: cmus terminated Segmentation fault (core dumped)

NOTE: Also tried on LXterminal when setting font size to 1.

1) uname -a:

Linux archimedes.localdomain 4.7.6-1-ARCH #1 SMP PREEMPT Fri Sep 30 19:28:42 CEST 2016 x86_64 GNU/Linux

2) cmus --version:

cmus v2.7.0-250-gb3b7c5e

3) cmus --plugins:

Input Plugins: /usr/lib/cmus/ip
  mad:
    Priority: 55
    File Types: mp3 mp2
    MIME Types: audio/mpeg audio/x-mp3 audio/x-mpeg
  wav:
    Priority: 50
    File Types: wav
    MIME Types:
  opus:
    Priority: 50
    File Types: opus
    MIME Types:
  mpc:
    Priority: 50
    File Types: mpc mpp mp+
    MIME Types: audio/x-musepack
  vorbis:
    Priority: 50
    File Types: ogg oga ogx
    MIME Types: application/ogg audio/x-ogg
  mp4:
    Priority: 50
    File Types: mp4 m4a m4b
    MIME Types:
  wavpack:
    Priority: 50
    File Types: wv
    MIME Types: audio/x-wavpack
  cue:
    Priority: 50
    File Types:
    MIME Types: application/x-cue
  modplug:
    Priority: 50
    File Types: mod s3m xm it 669 amf ams dbm dmf dsm far mdl med mtm okt ptm stm ult umx mt2 psm
    MIME Types:
  aac:
    Priority: 50
    File Types: aac
    MIME Types: audio/aac audio/aacp
  cdio:
    Priority: 50
    File Types:
    MIME Types: x-content/audio-cdda
  flac:
    Priority: 50
    File Types: flac fla
    MIME Types:
  ffmpeg:
    Priority: 30
    File Types: aa aac ac3 aif aifc aiff ape au fla flac m4a m4b mka mkv mp+ mp2 mp3 mp4 mpc mpp ogg shn tak tta wav webm wma wv
    MIME Types:

Output Plugins: /usr/lib/cmus/op
  pulse
  alsa
  oss
  jack
  ao

[mahkoh]

duplicate of #63