typo fix

nclock.c

@@ -90,7 +90,7 @@ void drawColon(int starty, int startx) {
 void drawTime(state *s, int hour, int min, int sec) {
     int newcenty =  s->centery - 3; //start above the center
     /* center X: */
-    /* (3 Nuberpairs + 2 colons) / 2 */
+    /* (3 Numberpairs + 2 colons) / 2 */
     int newcentx = s->centerx - ((3 * NUMBERPAIR + 2 * COLONSPACE) / 2);
     /* hour */
     drawNumber(newcenty, newcentx, hour);