Use unique_ptr for pfilter (CBloomFilter)

src/net.cpp

@@ -2741,7 +2741,7 @@ CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn
     nNextInvSend = 0;
     fRelayTxes = false;
     fSentAddr = false;
-    pfilter = new CBloomFilter();
+    pfilter = std::unique_ptr<CBloomFilter>(new CBloomFilter());
     timeLastMempoolReq = 0;
     nLastBlockTime = 0;
     nLastTXTime = 0;
@@ -2771,8 +2771,6 @@ CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn
 CNode::~CNode()
 {
     CloseSocket(hSocket);
-
-    delete pfilter;
 }
 
 void CNode::AskFor(const CInv& inv)

src/net.h

@@ -648,7 +648,7 @@ public:
     bool fSentAddr;
     CSemaphoreGrant grantOutbound;
     CCriticalSection cs_filter;
-    CBloomFilter* pfilter;
+    std::unique_ptr<CBloomFilter> pfilter;
     std::atomic<int> nRefCount;
 
     const uint64_t nKeyedNetGroup;

src/net_processing.cpp

@@ -2755,8 +2755,7 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
         else
         {
             LOCK(pfrom->cs_filter);
-            delete pfrom->pfilter;
-            pfrom->pfilter = new CBloomFilter(filter);
+            pfrom->pfilter.reset(new CBloomFilter(filter));
             pfrom->pfilter->UpdateEmptyFull();
             pfrom->fRelayTxes = true;
         }
@@ -2792,8 +2791,7 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
     {
         LOCK(pfrom->cs_filter);
         if (pfrom->GetLocalServices() & NODE_BLOOM) {
-            delete pfrom->pfilter;
-            pfrom->pfilter = new CBloomFilter();
+            pfrom->pfilter.reset(new CBloomFilter());
         }
         pfrom->fRelayTxes = true;
     }