Check SERIALIZATION_VERSION_STRING before deserializing anything else

Author: UdjinM6

src/governance/governance.h

@@ -340,6 +340,9 @@ class CGovernanceManager
         std::string strVersion;
         if (ser_action.ForRead()) {
             READWRITE(strVersion);
+            if (strVersion != SERIALIZATION_VERSION_STRING) {
+                return;
+            }
         } else {
             strVersion = SERIALIZATION_VERSION_STRING;
             READWRITE(strVersion);
@@ -351,10 +354,6 @@ class CGovernanceManager
         READWRITE(mapObjects);
         READWRITE(mapLastMasternodeObject);
         READWRITE(lastMNListForVotingKeys);
-        if (ser_action.ForRead() && (strVersion != SERIALIZATION_VERSION_STRING)) {
-            Clear();
-            return;
-        }
     }
 
     void UpdatedBlockTip(const CBlockIndex* pindex, CConnman& connman);

src/masternode/masternode-meta.h

@@ -101,6 +101,9 @@ class CMasternodeMetaMan
         std::string strVersion;
         if(ser_action.ForRead()) {
             READWRITE(strVersion);
+            if (strVersion != SERIALIZATION_VERSION_STRING) {
+                return;
+            }
         }
         else {
             strVersion = SERIALIZATION_VERSION_STRING;
@@ -122,10 +125,6 @@ class CMasternodeMetaMan
         }
 
         READWRITE(nDsqCount);
-
-        if(ser_action.ForRead() && (strVersion != SERIALIZATION_VERSION_STRING)) {
-            Clear();
-        }
     }
 
 public: