Se agrega propiedad pública al SC para saber la cantidad de proposals almacenadas

solidity/Ballot.sol

@@ -40,6 +40,7 @@ contract            Ballot
     Voter[]             public      voterList;
     /// @dev Short name (up to 32 bytes)
     bytes32[]           public      proposalList;
+    uint                public      proposalListLength;
     uint[]              private     emptyuintlist;
 
     /// @notice When the SC is being deployed, you must define initial conditions. When specifying percentages they are to have been multiplied with 100 million (5% is written as 5 million, since 5% is actially 0.05).
@@ -84,9 +85,11 @@ contract            Ballot
         /// @dev add it to the end of the proposalList
         uint        incoming                =   proposalNames.length;
         uint        i                       =   0;
+        proposalListLength      =   0;
         while ( i < incoming )
         {
             proposalList.push( proposalNames[i] );
+            proposalListLength++;
             i++;
         }
     }