Fix use of decorators within partials

If a decorator is used within a partial but not in the calling template, the hash is not passed in. For now error on the side of always including as just assigning values has minimal overhead.

Fixes #1089

lib/handlebars/runtime.js

@@ -161,7 +161,7 @@ export function template(templateSpec, env) {
       if (templateSpec.usePartial) {
         container.partials = container.merge(options.partials, env.partials);
       }
-      if (templateSpec.useDecorators) {
+      if (templateSpec.usePartial || templateSpec.useDecorators) {
         container.decorators = container.merge(options.decorators, env.decorators);
       }
     } else {

spec/regressions.js

@@ -212,4 +212,12 @@ describe('Regressions', function() {
     };
     shouldCompileToWithPartials(string, [{}, {}, partials], true, 'doctypelayoutsubcontent');
   });
+  it('GH-1089: should support failover content in multiple levels of inline partials', function() {
+    var string = '{{#> layout}}{{/layout}}';
+    var partials = {
+      doctype: 'doctype{{> content}}',
+      layout: '{{#> doctype}}{{#*inline "content"}}layout{{#> subcontent}}subcontent{{/subcontent}}{{/inline}}{{/doctype}}'
+    };
+    shouldCompileToWithPartials(string, [{}, {}, partials], true, 'doctypelayoutsubcontent');
+  });
 });