Build error because of empty initializers

[eschnett]

I am building notcurses 3.0.9. I see this build error on Windows when building with GCC 7:

/workspace/srcdir/notcurses/src/demo/animate.c: In function ‘spin_cycle’:
--
  | [21:04:40] /workspace/srcdir/notcurses/src/demo/animate.c:134:19: error: empty scalar initializer
  | [21:04:40]   134 \|   mbstate_t mbs = { };
  | [21:04:40]       \|                   ^
  | [21:04:40] /workspace/srcdir/notcurses/src/demo/animate.c:134:19: note: (near initialization for ‘mbs’)
  | [21:04:40]

I believe the C 11 standard does not allow initializing variables via {}, i.e. via empty initializer lists.

The same problem might exist further down in the same file in line 271 ncprogbar_options popts = { };.

[dankamongmen]

yeah, we ought be using the = { 0 } form, good call

[dankamongmen]

should be resolved. thanks!