notcurses: remove unused truecols field

src/demo/hud.c

@@ -618,7 +618,7 @@ int fpsgraph_init(struct notcurses* nc){
     .y = dimy - PLOTHEIGHT,
     .x = NCALIGN_CENTER,
     .rows = PLOTHEIGHT,
-    .cols = dimx,
+    .cols = dimx > 80 ? 80 : dimx,
     .userptr = NULL,
     .name = "fps",
     .resizecb = ncplane_resize_realign,

src/lib/internal.h

@@ -331,9 +331,6 @@ typedef struct notcurses {
   ncstats stats;  // some statistics across the lifetime of the notcurses ctx
   ncstats stashstats; // cumulative stats, unaffected by notcurses_stats_reset()
 
-  int truecols;   // true number of columns in the physical rendering area.
-                  // used only to see if output motion takes us to the next
-                  // line thanks to terminal action alone.
   FILE* ttyfp;    // FILE* for writing rasterized data
   int ttyfd;      // file descriptor for controlling tty
   ncinputlayer input; // input layer; we're in cbreak mode

src/lib/notcurses.c

@@ -1093,7 +1093,6 @@ notcurses* notcurses_init(const notcurses_options* opts, FILE* outfp){
             shortname_term ? shortname_term : "?",
             longname_term ? longname_term : "?");
   }
-  ret->truecols = dimx;
   if(interrogate_terminfo(&ret->tcache)){
     goto err;
   }

src/lib/render.c

@@ -26,7 +26,6 @@ notcurses_resize_internal(ncplane* pp, int* restrict rows, int* restrict cols){
   if(update_term_dimensions(n->ttyfd, rows, cols)){
     return -1;
   }
-  n->truecols = *cols;
   *rows -= n->margin_t + n->margin_b;
   if(*rows <= 0){
     *rows = 1;