Correctly handle functions that are scheduled after the clock is uninstalled and reinstalled from within Clock#tick.

Fixes #790.

src/core/Env.js

@@ -11,7 +11,7 @@ getJasmineRequireObj().Env = function(j$) {
 
     var realSetTimeout = j$.getGlobal().setTimeout;
     var realClearTimeout = j$.getGlobal().clearTimeout;
-    this.clock = new j$.Clock(global, new j$.DelayedFunctionScheduler(), new j$.MockDate(global));
+    this.clock = new j$.Clock(global, function () { return new j$.DelayedFunctionScheduler(); }, new j$.MockDate(global));
 
     var runnableLookupTable = {};
     var runnableResources = {};