[Account.cpp] SplitsVec&, ensure xaccAccountGetSplitList is freed

bindings/engine.i

@@ -83,6 +83,7 @@ engine-common.i */
 %newobject gnc_account_get_full_name;
 %newobject xaccTransGetAPARAcctSplitList;
 %newobject xaccTransGetPaymentAcctSplitList;
+%newobject xaccAccountGetSplitList;
 
 %include "engine-common.i"
 

libgnucash/engine/Account.cpp

@@ -5451,7 +5451,7 @@ gnc_account_merge_children (Account *parent)
 
 
 static void
-xaccSplitsBeginStagedTransactionTraversals (SplitsVec splits)
+xaccSplitsBeginStagedTransactionTraversals (SplitsVec& splits)
 {
     for (auto s : splits)
     {