fix view/parse of nil value on error

Signed-off-by: Julien Eluard <julien.eluard@gmail.com>

src/pluto/reader/views.cljc

@@ -111,8 +111,10 @@
 (defn parse [ctx ext o]
   (if (list? o) ;; TODO introduce a block? fn
     (let [{:keys [data errors] :as m} (blocks/parse ctx ext o)]
-      ;; TODO handle nil data case
-      (errors/merge-errors (parse ctx ext data) errors))
+      (errors/merge-errors
+       (when data
+         (parse ctx ext data))
+       errors))
     (parse-hiccup-element ctx ext o)))
 
 (defn- inject-properties [m properties]