bug: categorias sin elementos no soportado

android/Pictogrammar/app/src/main/java/com/yottacode/pictogram/grammar/Vocabulary.java

@@ -119,11 +119,17 @@ public class Vocabulary implements Iterable<Picto>, iRestapiListener, iVocabular
        PCBcontext.getPcbdb().addPicto(pic);
    }
 
+    private boolean empty_category(int pic_cat) {return this.pictos.get(pic_cat)==null;}
+
     private int find_picto_index(int pic_cat, int pic_id) {
         LinkedList<Picto> pictos_cat=this.pictos.get(pic_cat);
         int index=-1;
-        for (int i=0; i<pictos_cat.size() && index==-1; i++)
+        Log.d("Vocabulary BORRA 2.1",pic_cat+" "+pic_id);
+        for (int i=0; i<pictos_cat.size() && index==-1; i++) {
+            Log.d("Vocabulary BORRA 2.15",i+":"+pictos_cat.get(i).get_id());
             if (pictos_cat.get(i).get_id()==pic_id) index=i;
+        }
+        Log.d("Vocabulary BORRA 2.2",pic_cat+" "+pic_id+" "+index);
         return index;
     }
     /**
@@ -144,7 +150,7 @@ public class Vocabulary implements Iterable<Picto>, iRestapiListener, iVocabular
      */
 
     public void modifyAttsPicto(int pic_cat, int pic_id, JSONObject attrs) {
-
+        Log.d("Vocabulary MOD BORRA 2",pic_cat+"---"+pic_id);
         Picto picto=this.pictos.get(pic_cat).get(find_picto_index(pic_cat, pic_id));
         picto.set_json_attr(attrs);
         PCBcontext.getPcbdb().modifyPicto(pic_id, attrs.toString());
@@ -190,7 +196,10 @@ public class Vocabulary implements Iterable<Picto>, iRestapiListener, iVocabular
      * @return
      */
     private boolean isVisibleCategory(int id) {
+
+        if (empty_category(id)) return false;
         boolean visible=false;
+
         for (Picto picto : this.pictos.get(id)) {
             visible=picto.is_enabled();
             if (visible) break;
@@ -289,7 +298,7 @@ public class Vocabulary implements Iterable<Picto>, iRestapiListener, iVocabular
             }
             case update:{
 
-                Log.d("Vocabulary.java", "Entra en el case update. Picto cat: " + picto_cat + " y picto_id: " + picto_id);
+                Log.d("Vocabulary.java", "Update cat" + picto_cat + ". icto_id: " + picto_id);
                 modifyAttsPicto(picto_cat, picto_id, args);
                 break;
             }