move sixel support bit to tcache from notcurses #200

src/lib/internal.h

@@ -282,6 +282,7 @@ typedef struct tinfo {
   uint32_t bg_collides_default;
   bool sextants;  // do we have (good, vetted) Unicode 13 sextant support?
   bool braille;   // do we have Braille support? (linux console does not)
+  bool libsixel;  // do we have Sixel support?
 } tinfo;
 
 typedef struct ncinputlayer {
@@ -363,7 +364,6 @@ typedef struct notcurses {
   int loglevel;
   palette256 palette; // 256-indexed palette can be used instead of/with RGB
   bool palette_damage[NCPALETTESIZE];
-  bool libsixel;  // do we have Sixel support?
 } notcurses;
 
 #include "blitset.h"

src/lib/notcurses.c

@@ -935,7 +935,6 @@ notcurses* notcurses_core_init(const notcurses_options* opts, FILE* outfp){
   ret->lastframe = NULL;
   ret->lfdimy = 0;
   ret->lfdimx = 0;
-  ret->libsixel = false;
   egcpool_init(&ret->pool);
   if((ret->loglevel = opts->loglevel) > NCLOGLEVEL_TRACE || ret->loglevel < 0){
     fprintf(stderr, "Invalid loglevel %d\n", ret->loglevel);
@@ -2032,7 +2031,7 @@ bool notcurses_canchangecolor(const notcurses* nc){
 }
 
 bool notcurses_cansixel(const notcurses* nc){
-  return nc->libsixel;
+  return nc->tcache.libsixel;
 }
 
 palette256* palette256_new(notcurses* nc){