--- array.c	2016-08-24 21:31:55.000000000 +0200
+++ array.c	2017-04-12 22:50:57.348606470 +0200
@@ -985,7 +985,7 @@
 			ret = strncasecmpmbs((const unsigned char *) cp1,
 					     (const unsigned char *) cp2, lmin);
 		} else {
-			for (ret = 0; lmin-- > 0 && ret == 0; cp1++, cp2++)
+			for (ret = 0; --lmin > 0 && ret == 0; cp1++, cp2++)
 				ret = casetable[*cp1] - casetable[*cp2];
 		}
 		if (ret != 0)