sigabrt in notcurses-view on invalid filename

[dankamongmen]

I was rendering a video in Openshot, not yet complete, h.264 using intel hardware encoder. I opened it in notcurses-view, and got a SIGABRT. I'd expect an error message, similar to what mpv would generate.

[dankamongmen]

Having difficulties reproducing this.

[dankamongmen]

Ahhh. I think what it might have been is that if we invoke notcurses-view with a missing file, it SIGABRTs out. I can't reproduce this with a partial file.

[dankamongmen]

OK, i forgot @grendello rewrote notcurses-view to use the C++ API. This is just failure to catch an exception bubbling up from the Visual constructor.

[dankamongmen]

Looks fixed:

[schwarzgerat](0) $ ./notcurses-view e 
Term: 80x74 xterm-256color (xterm with 256 colors)

 notcurses 1.2.2 by nick black et al
  74 rows, 80 columns (92.50KiB), 256 colors (direct)
  compiled with gcc-9.2.1 20200224
  terminfo from ncurses 6.2.20200212
  avformat 58.39.100
  avutil 56.41.100
  swscale 5.6.100
e: notcurses failed to create a new visual
[schwarzgerat](1) $