1113: Fixed not null parameter

Author: Iamwade

src/com/magento/idea/magento2plugin/actions/comparator/CompareTemplateAction.java

@@ -83,6 +83,9 @@ public void update(final @NotNull AnActionEvent event) {
         }
         final String originalModuleName = getOriginalModuleName(project, psiFile);
 
+        if (originalModuleName == null) {
+            return;
+        }
         final PsiDirectory originalModuleDirectory =
                 new ModuleIndex(project).getModuleDirectoryByModuleName(originalModuleName);