#1890 pipe also the fake php file to completion proxying for php

Author: Haehnchen

src/main/java/fr/adrienbrault/idea/symfony2plugin/templating/TwigTemplateCompletionContributor.java

@@ -1071,7 +1071,7 @@ protected void addCompletions(@NotNull CompletionParameters parameters, @NotNull
 
                 CompletionService.getCompletionService().performCompletion(new CompletionParameters(
                     firstChild,
-                    target.getContainingFile(),
+                    firstChild.getContainingFile(),
                     CompletionType.BASIC,
                     firstChild.getTextOffset(),
                     parameters.getInvocationCount(),