fix(pseudopatterns): use the template instead of the pseudo data file for template rendering #1308 (#1312)

Author: mfranzke

packages/engine-twig/lib/engine_twig.js

@@ -130,7 +130,9 @@ var engine_twig = {
 
   // render it
   renderPattern: function renderPattern(pattern, data, partials) {
-    var patternPath = pattern.relPath;
+    var patternPath = pattern.basePattern
+      ? pattern.basePattern.relPath
+      : pattern.relPath;
     if (patternPath.lastIndexOf(metaPath) === 0) {
       patternPath = patternPath.substring(metaPath.length + 1);
     }