Rename ListTransactions filter variable

Suggested by MeshCollider <dobsonsa68@gmail.com> in
bitcoin/bitcoin#14411 (comment)

Author: ryanofsky

src/wallet/rpcwallet.cpp

@@ -1261,21 +1261,21 @@ static void MaybePushAddress(UniValue & entry, const CTxDestination &dest)
 /**
  * List transactions based on the given criteria.
  *
- * @param  pwallet    The wallet.
- * @param  wtx        The wallet transaction.
- * @param  nMinDepth  The minimum confirmation depth.
- * @param  fLong      Whether to include the JSON version of the transaction.
- * @param  ret        The UniValue into which the result is stored.
- * @param  filter     The "is mine" filter bool.
- * @param  filter_label Optional label string to filter incoming transactions.
+ * @param  pwallet        The wallet.
+ * @param  wtx            The wallet transaction.
+ * @param  nMinDepth      The minimum confirmation depth.
+ * @param  fLong          Whether to include the JSON version of the transaction.
+ * @param  ret            The UniValue into which the result is stored.
+ * @param  filter_ismine  The "is mine" filter flags.
+ * @param  filter_label   Optional label string to filter incoming transactions.
  */
-static void ListTransactions(interfaces::Chain::Lock& locked_chain, CWallet* const pwallet, const CWalletTx& wtx, int nMinDepth, bool fLong, UniValue& ret, const isminefilter& filter, const std::string* filter_label)
+static void ListTransactions(interfaces::Chain::Lock& locked_chain, CWallet* const pwallet, const CWalletTx& wtx, int nMinDepth, bool fLong, UniValue& ret, const isminefilter& filter_ismine, const std::string* filter_label)
 {
     CAmount nFee;
     std::list<COutputEntry> listReceived;
     std::list<COutputEntry> listSent;
 
-    wtx.GetAmounts(listReceived, listSent, nFee, filter);
+    wtx.GetAmounts(listReceived, listSent, nFee, filter_ismine);
 
     bool involvesWatchonly = wtx.IsFromMe(ISMINE_WATCH_ONLY);