CBlockIndex()::SetNull() method to avoid code repetition

src/main.h

@@ -718,7 +718,7 @@ public:
     // (memory only) Sequencial id assigned to distinguish order in which blocks are received.
     uint32_t nSequenceId;
 
-    CBlockIndex()
+    void SetNull()
     {
         phashBlock = NULL;
         pprev = NULL;
@@ -740,20 +740,14 @@ public:
         nNonce         = 0;
     }
 
+    CBlockIndex()
+    {
+        SetNull();
+    }
+
     CBlockIndex(CBlockHeader& block)
     {
-        phashBlock = NULL;
-        pprev = NULL;
-        pskip = NULL;
-        nHeight = 0;
-        nFile = 0;
-        nDataPos = 0;
-        nUndoPos = 0;
-        nChainWork = 0;
-        nTx = 0;
-        nChainTx = 0;
-        nStatus = 0;
-        nSequenceId = 0;
+        SetNull();
 
         nVersion       = block.nVersion;
         hashMerkleRoot = block.hashMerkleRoot;