This is cleaner, prevent the percent from being greater than 100.

src/cmd/emg/display.c

@@ -623,6 +623,7 @@ void modeline(WINDOW *wp)
   int lchar;			/* character to draw line in buffer with */
   int n;			/* cursor position count */
   int len;			/* line/column display check */
+  int perc;			/* percent down */
   char sl[25];			/* line/column display (probably overkill) */
 
   n = wp->w_toprow + wp->w_ntrows; /* Location */
@@ -675,8 +676,11 @@ void modeline(WINDOW *wp)
       n += 3;
     }
 
-  len = snprintf(sl, sizeof(sl), " %ld%% (%d,%d) ",
-		(long)((100*(wp->w_dotline + 1)) / curwp->w_bufp->b_lines),
+  perc = (100*(wp->w_dotline + 1)) / curwp->w_bufp->b_lines;
+  if (perc > 100)
+    perc = 100;
+
+  len = snprintf(sl, sizeof(sl), " %d%% (%d,%d) ", perc,
 		(wp->w_dotline + 1), getccol(FALSE));
   if (len < sizeof(sl) && len != -1)
     n += vtputs(sl);