Remove C++11-specific features

src/masternode-budget.cpp

@@ -1250,7 +1250,7 @@ void CBudgetManager::Sync(CNode* pfrom, uint256 nProp, bool fPartial)
 
 bool CBudgetManager::SubmitProposalVote(const CBudgetVote& vote, std::string& strError)
 {
-    map<uint256, CBudgetProposal>::const_iterator found = mapProposals.find(vote.nProposalHash);
+    map<uint256, CBudgetProposal>::iterator found = mapProposals.find(vote.nProposalHash);
     if (found == std::end(mapProposals))
     {
         strError = "Proposal not found!";

src/test/governance-test.cpp

@@ -37,7 +37,7 @@ namespace
     CKey CreateKeyPair(std::vector<unsigned char> privKey)
     {
         CKey keyPair;
-        keyPair.Set(std::begin(privKey), std::end(privKey), true);
+        keyPair.Set(privKey.begin(), privKey.end(), true);
 
         return keyPair;
     }