Make sure options.hash is an empty {} if no hash is present to eliminate necessary guards in helpers

lib/handlebars/compiler/compiler.js

@@ -574,14 +574,17 @@ Handlebars.JavaScriptCompiler = function() {};
     populateParams: function(paramSize, helperId, program, inverse, hasHash, fn) {
       var needsRegister = hasHash || this.options.stringParams || inverse || this.options.data;
       var id = this.popStack(), nextStack;
-      var params = [], param, stringParam;
+      var params = [], param, stringParam, stringOptions;
 
       if (needsRegister) {
         this.register('tmp1', program);
+        stringOptions = 'tmp1';
+      } else {
+        stringOptions = '{ hash: {} }';
       }
 
-      if (hasHash) {
-        var hash = this.popStack();
+      if (needsRegister) {
+        var hash = (hasHash ? this.popStack() : '{}');
         this.source.push('tmp1.hash = ' + hash + ';');
       }
 
@@ -607,7 +610,7 @@ Handlebars.JavaScriptCompiler = function() {};
         this.source.push('tmp1.data = data;');
       }
 
-      params.push(needsRegister ? 'tmp1' : '{}');
+      params.push(stringOptions);
 
       this.populateCall(params, id, helperId || id, fn);
     },