ProGuard config, small fix

app/proguard.cfg

@@ -78,4 +78,9 @@
     public static *** w(...);
     public static *** d(...);
     public static *** e(...);
-}
+}
+
+# greenrobot EventBus
+-keepclassmembers class ** {
+    public void onEvent*(**);
+}

core/src/main/res/values/arrays.xml

@@ -2,7 +2,7 @@
 <resources>
 
     <string-array name="smart_mark_as_played_values">
-        <item>off</item>
+        <item>0</item>
         <item>15</item>
         <item>30</item>
         <item>45</item>