changed function constant to view

contracts/examples/PreMintedCrowdsale.sol

@@ -54,7 +54,7 @@ contract PreMintedCrowdsale is Crowdsale {
   }
 
   // @return true if crowdsale event has ended
-  function hasEnded() public constant returns (bool) {
+  function hasEnded() public view returns (bool) {
     bool capReached = PseudoMinter(token).availableSupply() < rate;
     return super.hasEnded() || capReached;
   }

contracts/token/PseudoMinter.sol

@@ -55,7 +55,7 @@ contract PseudoMinter is Mintable, Ownable {
    * @dev returns amount of tokens that can be pseudo minted. Be aware that
    * this does not necessarily represent the hard cap of spendable tokens!
    */
-  function availableSupply() public constant returns (uint256) {
+  function availableSupply() public view returns (uint256) {
     return token.allowance(vault, this);
   }
 }