fixed ArrayIndexOutOfBounds for empty feature list
diff --git a/src/main/java/org/apache/sling/feature/apiregions/impl/RegionConfiguration.java b/src/main/java/org/apache/sling/feature/apiregions/impl/RegionConfiguration.java
index acb7720..925a845 100644
--- a/src/main/java/org/apache/sling/feature/apiregions/impl/RegionConfiguration.java
+++ b/src/main/java/org/apache/sling/feature/apiregions/impl/RegionConfiguration.java
@@ -265,7 +265,7 @@
         for(final String val : convert(valObj)) {
             final String[] parts = val.split("=");
             final String n = parts[0];
-            final String[] features = parts[1].split(",");
+            final String[] features = parts.length == 1 ? new String[0] : parts[1].split(",");
             addValuesToMap(map, n, Arrays.asList(features), constructor);
         }
     }