Fix GetFilteredNotes to use int for minDepth like upstream and avoid casting problems. Don't use FindMyNotes as mapNoteData has already been set on wallet tx.

src/wallet/wallet.h

@@ -905,7 +905,7 @@ public:
     void SetBroadcastTransactions(bool broadcast) { fBroadcastTransactions = broadcast; }
     
     /* Find notes filtered by payment address, min depth, ability to spend */
-    bool GetFilteredNotes(std::vector<CNotePlaintextEntry> & outEntries, std::string address, size_t minDepth, bool ignoreSpent=true);
+    bool GetFilteredNotes(std::vector<CNotePlaintextEntry> & outEntries, std::string address, int minDepth=1, bool ignoreSpent=true);
     
 };