Fix keyed stores to strings convertible to indices

test/mjsunit/harmony/proxies.js

Index: test/mjsunit/harmony/proxies.js
diff --git a/test/mjsunit/harmony/proxies.js b/test/mjsunit/harmony/proxies.js
index 585574eb43a82b784a0f6402faab96e369af87a6..f1d37b445a9fc866375f1f9ccba9426c6f0e3b57 100644
--- a/test/mjsunit/harmony/proxies.js
+++ b/test/mjsunit/harmony/proxies.js
@@ -382,6 +382,10 @@ function TestSet2(create, handler) {
   assertEquals(46, (function(n) { return p[n] = 46 })(99))
   assertEquals("99", key)
   assertEquals(46, val)
+
+  assertEquals(47, p["0"] = 47)
+  assertEquals("0", key)
+  assertEquals(47, val)
 }
 
 TestSet({