Be careful when using setDouble that we shouldn't use setNumber instead to fit in an int when possible. Was missing a lot in jsdate.cpp

js/src/jsapi.cpp

@@ -3161,7 +3161,7 @@ JS_DefineConstDoubles(JSContext *cx, JSObject *obj, JSConstDoubleSpec *cds)
 
     CHECK_REQUEST(cx);
     for (ok = JS_TRUE; cds->name; cds++) {
-        Value value(DoubleTag(cds->dval));
+        Value value = DoubleTag(cds->dval);
         attrs = cds->flags;
         if (!attrs)
             attrs = JSPROP_READONLY | JSPROP_PERMANENT;