* switch to isSafeInteger

Author: swannodette

src/main/cljs/cljs/core.cljs

@@ -1031,7 +1031,7 @@
 
     (number? o)
     (if ^boolean (js/isFinite o)
-      (if-not ^boolean (.isInteger js/Number o)
+      (if-not ^boolean (.isSafeInteger js/Number o)
         (hash-double o)
         (js-mod (Math/floor o) 2147483647))
       (case o