Minor NxTerm-related clean-up

configs/open1788/README.txt

@@ -408,7 +408,8 @@ Configuration Directories
 
     STATUS:  2019-03-08:  Currently I am seeing a problem.  The display looks
       good until it begins scrolling when the display is full.  Then there are
-      missing characters.
+      missing characters.  This is probably related to clearing of the final
+      line of the display after the scroll(?)
 
   nsh
   ---

graphics/nxterm/nxterm_scroll.c

@@ -210,8 +210,6 @@ void nxterm_scroll(FAR struct nxterm_state_s *priv, int scrollheight)
            */
 
           priv->nchars--;
-          priv->bm[priv->nchars].code  = ' ';
-          priv->bm[priv->nchars].flags = BMFLAGS_NOGLYPH;
         }
 
       /* No.. just decrement its vertical position (moving it "up" the

libs/libnx/nxfonts/nxfonts_cache.c

@@ -542,7 +542,8 @@ nxf_renderglyph(FAR struct nxfonts_fcache_s *priv,
   /* Allocate the glyph (always succeeds) */
 
   bmsize = stride * height;
-  glyph  = (FAR struct nxfonts_glyph_s *)lib_malloc(SIZEOF_NXFONTS_GLYPH_S(bmsize));
+  glyph  = (FAR struct nxfonts_glyph_s *)
+    lib_malloc(SIZEOF_NXFONTS_GLYPH_S(bmsize));
 
   if (glyph != NULL)
     {