Fix build error in init when building with bootchart

There was a build error in init.c if you enabled bootchart, this
should probably be shipped upstream if not fixed already.

Change-Id: Iea3451c3e15d5cac00c5420d99bfce9a950aaaac

init/init.c

@@ -646,6 +646,8 @@ static int bootchart_init_action(int nargs, char **args)
     } else {
         NOTICE("bootcharting ignored\n");
     }
+
+    return 0;
 }
 #endif