Merge branch '0.4.x' into 0.5.x

src/main.cpp

@@ -1502,6 +1502,16 @@ bool CBlock::CheckBlock() const
     if (uniqueTx.size() != vtx.size())
         return DoS(100, error("CheckBlock() : duplicate transaction"));
 
+    // Check for duplicate txids. This is caught by ConnectInputs(),
+    // but catching it earlier avoids a potential DoS attack:
+    set<uint256> uniqueTx;
+    BOOST_FOREACH(const CTransaction& tx, vtx)
+    {
+        uniqueTx.insert(tx.GetHash());
+    }
+    if (uniqueTx.size() != vtx.size())
+        return error("CheckBlock() : duplicate transaction");
+
     // Check that it's not full of nonstandard transactions
     if (GetSigOpCount() > MAX_BLOCK_SIGOPS)
         return DoS(100, error("CheckBlock() : out-of-bounds SigOpCount"));

src/serialize.h

@@ -1245,8 +1245,6 @@ public:
     int nType;
     int nVersion;
 
-    typedef FILE element_type;
-
     CAutoFile(FILE* filenew=NULL, int nTypeIn=SER_DISK, int nVersionIn=VERSION)
     {
         file = filenew;

src/util.cpp

@@ -236,7 +236,7 @@ inline int OutputDebugStringF(const char* pszFormat, ...)
             *pend = '\0';
             char* p1 = pszBuffer;
             char* p2;
-            while (p2 = strchr(p1, '\n'))
+            while ((p2 = strchr(p1, '\n')))
             {
                 p2++;
                 char c = *p2;

src/wallet.h

@@ -175,7 +175,6 @@ public:
     }
 
     int LoadWallet(bool& fFirstRunRet);
-//    bool BackupWallet(const std::string& strDest);
 
     bool SetAddressBookName(const CBitcoinAddress& address, const std::string& strName);