Replace 520 constant with MAX_SCRIPT_ELEMENT_SIZE

src/main.cpp

@@ -3588,7 +3588,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
 
         // Nodes must NEVER send a data item > 520 bytes (the max size for a script data object,
         // and thus, the maximum size any matched object can have) in a filteradd message
-        if (vData.size() > 520)
+        if (vData.size() > MAX_SCRIPT_ELEMENT_SIZE)
         {
             pfrom->Misbehaving(100);
         } else {

src/script.cpp

@@ -340,7 +340,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
             //
             if (!script.GetOp(pc, opcode, vchPushValue))
                 return false;
-            if (vchPushValue.size() > 520)
+            if (vchPushValue.size() > MAX_SCRIPT_ELEMENT_SIZE)
                 return false;
             if (opcode > OP_16 && ++nOpCount > 201)
                 return false;
@@ -670,7 +670,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
                     valtype& vch2 = stacktop(-1);
                     vch1.insert(vch1.end(), vch2.begin(), vch2.end());
                     popstack(stack);
-                    if (stacktop(-1).size() > 520)
+                    if (stacktop(-1).size() > MAX_SCRIPT_ELEMENT_SIZE)
                         return false;
                 }
                 break;

src/script.h

@@ -17,6 +17,8 @@
 class CCoins;
 class CTransaction;
 
+static const unsigned int MAX_SCRIPT_ELEMENT_SIZE = 520; // bytes
+
 /** Signature hash types/flags */
 enum
 {