fixup! Runtime: fix caml_utf8_of_utf16 bug in high surrogate case

Author: hhugo

runtime/js/mlBytes.js

@@ -157,7 +157,7 @@ function caml_utf16_of_utf8(s) {
           c = c2 + (c << 6);
           if (c1 < 0xf0) {
             v = c - 0xe2080;
-            if (v < 0x800 || (v >= 0xd7ff && v < 0xe000)) v = 2;
+            if (v < 0x800 || (v > 0xd7ff && v < 0xe000)) v = 2;
           } else {
             v = 3;
             if (