Fix default podModulePrefix in search indexing

Author: dfreeman

lib/broccoli/search-indexer.js

@@ -57,7 +57,7 @@ module.exports = class SearchIndexCompiler extends Writer {
 
     // This will need to change for module unification...
     let modulePrefix = this.config.modulePrefix;
-    let podModulePrefix = this.config.podModulePrefix;
+    let podModulePrefix = this.config.podModulePrefix || modulePrefix;
 
     let routePath;
     if (relativePath.indexOf(podModulePrefix) === 0 && POD_TEMPLATE_REGEX.test(relativePath)) {