Only show the “Show stock split adjusted amounts” checkbox when there are stock splits

Added has_stock_split field to Account private.  This flag is set to true when  xaccAccountRecomputeBalance() detects a stock-split split otherwise it is false.  Defined and declared xaccAccountHasStockSplit() for use by the Lot Viewer to whether to display the check box.

libgnucash/engine/Account.cpp

@@ -328,6 +328,7 @@ gnc_account_init(Account* acc)
     priv->starting_cleared_balance = gnc_numeric_zero();
     priv->starting_reconciled_balance = gnc_numeric_zero();
     priv->balance_dirty = FALSE;
+    priv->has_stock_split = false;
 
     new (&priv->children) AccountVec ();
     new (&priv->splits) SplitsVec ();
@@ -1456,6 +1457,7 @@ xaccFreeAccount (Account *acc)
     priv->commodity = nullptr;
 
     priv->balance_dirty = FALSE;
+    priv->has_stock_split = false;
     priv->sort_dirty = FALSE;
     priv->splits.~SplitsVec();
     priv->children.~AccountVec();
@@ -2288,6 +2290,7 @@ xaccAccountRecomputeBalance (Account * acc)
     auto noclosing_balance  = priv->starting_noclosing_balance;
     auto cleared_balance    = priv->starting_cleared_balance;
     auto reconciled_balance = priv->starting_reconciled_balance;
+    auto has_stock_split    = false;
 
     PINFO ("acct=%s starting baln=%" G_GINT64_FORMAT "/%" G_GINT64_FORMAT,
            priv->accountName, balance.num, balance.denom);
@@ -2314,6 +2317,7 @@ xaccAccountRecomputeBalance (Account * acc)
                                                    GNC_HOW_RND_ROUND_HALF_UP));
             }
             balance = new_balance;
+            has_stock_split = true;
         }
         else
         {
@@ -2348,6 +2352,7 @@ xaccAccountRecomputeBalance (Account * acc)
     priv->cleared_balance = cleared_balance;
     priv->reconciled_balance = reconciled_balance;
     priv->balance_dirty = FALSE;
+    priv->has_stock_split = has_stock_split;
 }
 
 /********************************************************************\
@@ -3502,6 +3507,13 @@ xaccAccountGetProjectedMinimumBalance (const Account *acc)
     return minimum ? *minimum : gnc_numeric_zero();
 }
 
+gboolean
+xaccAccountHasStockSplit (const Account *acc)
+{
+    g_return_val_if_fail(GNC_IS_ACCOUNT(acc), false);
+    return GET_PRIVATE(acc)->has_stock_split;
+}
+
 
 /********************************************************************\
 \********************************************************************/

libgnucash/engine/Account.h

@@ -648,6 +648,10 @@ typedef enum
     gnc_numeric xaccAccountGetBalanceChangeForPeriod (
         Account *acc, time64 date1, time64 date2, gboolean recurse);
 
+    /** Returns true if the account has a stock split,
+     * otherwise false. */
+    gboolean xaccAccountHasStockSplit (const Account *acc);
+
     /** @} */
 
     /** @name Account Children and Parents.

libgnucash/engine/AccountP.hpp

@@ -114,6 +114,7 @@ typedef struct AccountPrivate
     gnc_numeric reconciled_balance;
  
     gboolean balance_dirty;     /* balances in splits incorrect */
+    gboolean has_stock_split;   /* account includes a stock split */
 
     std::vector<Split*> splits;              /* list of split pointers */
     GHashTable* splits_hash;