Disable quorum for grandfathered blocks

Research reward checks are disabled before nGrandfather. There is no
reason to update quorum state for grandfathered blocks since nothing
checks that data until after nGrandfather:

src/main.cpp

@@ -3955,7 +3955,13 @@ void GridcoinServices()
         uiInterface.NotifyBlocksChanged();
     }
 
-    // Services thread activity
+    // Research reward checks are disabled before nGrandfather. There is no
+    // reason to update quorum state for grandfathered blocks since nothing
+    // checks that data until after nGrandfather:
+    //
+    if (pindexBest->nHeight < nGrandfather) {
+        return;
+    }
 
     if(IsV9Enabled_Tally(nBestHeight))
     {
@@ -4005,8 +4011,9 @@ void GridcoinServices()
     }
 
     //Dont perform the following functions if out of sync
-    if (pindexBest->nHeight < nGrandfather || OutOfSyncByAge())
+    if (OutOfSyncByAge()) {
         return;
+    }
 
     //Backup the wallet once per 900 blocks or as specified in config:
     int nWBI = GetArg("-walletbackupinterval", 900);