return early for amount=0

src/base/DeltaResolver.sol

@@ -20,8 +20,9 @@ abstract contract DeltaResolver is ImmutableState {
     /// @notice Take an amount of currency out of the PoolManager
     /// @param currency Currency to take
     /// @param recipient Address to receive the currency
-    /// @param amount Amount to take
+    /// @dev Returns early if the amount is 0
     function _take(Currency currency, address recipient, uint256 amount) internal {
+        if (amount == 0) return;
         poolManager.take(currency, recipient, amount);
     }
 
@@ -30,7 +31,9 @@ abstract contract DeltaResolver is ImmutableState {
     /// @param currency Currency to settle
     /// @param payer Address of the payer
     /// @param amount Amount to send
+    /// @dev Returns early if the amount is 0
     function _settle(Currency currency, address payer, uint256 amount) internal {
+        if (amount == 0) return;
         if (currency.isAddressZero()) {
             poolManager.settle{value: amount}();
         } else {