feat(event): add empty logic after obtaining transaction information

Author: zeusoo001

framework/src/main/java/org/tron/core/services/jsonrpc/filters/LogMatch.java

@@ -85,7 +85,9 @@ public LogFilterElement[] matchBlockOneByOne()
     for (long blockNum : blockNumList) {
       List<TransactionInfo> transactionInfoList =
               manager.getTransactionInfoByBlockNum(blockNum).getTransactionInfoList();
-
+      if (transactionInfoList.isEmpty()) {
+        continue;
+      }
       String blockHash = manager.getChainBaseManager().getBlockIdByNum(blockNum).toString();
       List<LogFilterElement> matchedLog = matchBlock(logFilterWrapper.getLogFilter(), blockNum,
           blockHash, transactionInfoList, false);