Add the at-error feature flag

xzyfer · xzyfer · commit 170de9cccb50 · 2015-03-31T12:58:35.000+11:00
diff --git a/functions.cpp b/functions.cpp
@@ -148,7 +148,8 @@ namespace Sass {
 
     // features
     static set<string> features {
-      "global-variable-shadowing"
+      "global-variable-shadowing",
+      "at-error"
     };
 
     ////////////////
