Re-use variable in IexecPoco2Delegate in contribute(...) function (#168)

Author: gfournierPro

CHANGELOG.md

@@ -6,6 +6,7 @@
 - [x] `IexecPoco2Delegate.sol`
 
 ### Features
+- Re-use variable in `IexecPoco2Delegate` in `contribute(...)` function. (#168)
 - Remove unnecessary back and forth transfers in `IexecPoco2Delegate` happening during `claim(..)`. (#167)
 - Remove references to blockscout v5. (#161)
 - Migrate integration test files to Typescript & Hardhat:

contracts/modules/delegates/IexecPoco2Delegate.sol

@@ -168,7 +168,7 @@ contract IexecPoco2Delegate is IexecPoco2, DelegateBase, IexecEscrow, SignatureV
         uint256 delta = Math.max(group, 1) * weight - group;
 
         contribution.weight = Math.log2(weight);
-        consensus.group[_resultHash] = consensus.group[_resultHash] + delta;
+        consensus.group[_resultHash] = group + delta;
         consensus.total = consensus.total + delta;
 
         // Check consensus