Fix curses bug: garbled output in nl mode.

Use nonl mode in sl, as more efficient.

src/cmd/sl/sl.c

@@ -90,6 +90,7 @@ int main(int argc, char *argv[])
     initscr();
     signal(SIGINT, SIG_IGN);
     noecho();
+    nonl();
     leaveok(stdscr, TRUE);
     scrollok(stdscr, FALSE);
 

src/libcurses/cr_put.c

@@ -160,7 +160,7 @@ plod(cnt)
 	 * If we will later need a \n which will turn into a \r\n by
 	 * the system or the terminal, then don't bother to try to \r.
 	 */
-	if ((NONL || !_pfast) && outline < destline)
+	if (!_pfast && outline < destline)
 		goto dontcr;
 	/*
 	 * If the terminal will do a \r\n and there isn't room for it,
@@ -195,12 +195,13 @@ dontcr:
 		outline++;
 		if (NL)
 			tputs(NL, 0, plodput);
-		else
+		else {
-			plodput('\n');
+                        plodput('\n');
+                        if (!_pfast)
+                                outcol = 0;
+                }
 		if (plodcnt < 0)
 			goto out;
-		if (NONL || _pfast == 0)
-			outcol = 0;
 	}
 	if (BT)
 		k = strlen(BT);
@@ -271,7 +272,7 @@ dontcr:
 			}
 		else
 nondes:
-		     if (ND)
+                if (ND)
 			tputs(ND, 0, plodput);
 		else
 			plodput(' ');

src/libcurses/cr_tty.c

@@ -52,6 +52,7 @@ gettmode()
 	_res_flg = _tty.sg_flags;
 	GT = ((_tty.sg_flags & XTABS) == 0);
 	NONL = ((_tty.sg_flags & CRMOD) == 0);
+	_pfast = NONL;
 	_tty.sg_flags &= ~XTABS;
 	ioctl(_tty_ch, TIOCSETP, &_tty);
 # ifdef DEBUG
@@ -59,8 +60,6 @@ gettmode()
 	fprintf(outf, "GETTMODE: NONL = %s\n", NONL ? "TRUE" : "FALSE");
 	fprintf(outf, "GETTMODE: ospeed = %d\n", ospeed);
 # endif
-	/* Use nonl mode by default. */
-	nonl();
 }
 
 /*