wallet: enable avoid_partial_spends by default if avoid_reuse is set

src/wallet/rpcwallet.cpp

@@ -448,6 +448,8 @@ static UniValue sendtoaddress(const JSONRPCRequest& request)
     }
 
     coin_control.m_avoid_address_reuse = GetAvoidReuseFlag(pwallet, request.params[8]);
+    // We also enable partial spend avoidance if reuse avoidance is set.
+    coin_control.m_avoid_partial_spends |= coin_control.m_avoid_address_reuse;
 
     EnsureWalletIsUnlocked(pwallet);