Do not lookup private data twice when copying commodity mnemonic.

Note that mnemonics are not copied on branches/2.2.


git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@17812 57a11ea4-9604-0410-9ed3-97b8803252fd

src/engine/gnc-commodity.c

@@ -889,7 +889,7 @@ gnc_commodity_copy(gnc_commodity * dest, const gnc_commodity *src)
   CommodityPrivate* dest_priv = GET_PRIVATE(dest);
 
   gnc_commodity_set_fullname (dest, src_priv->fullname);
-  gnc_commodity_set_mnemonic (dest, gnc_commodity_get_mnemonic(src));
+  gnc_commodity_set_mnemonic (dest, src_priv->mnemonic);
   dest_priv->namespace = src_priv->namespace;
   gnc_commodity_set_fraction (dest, src_priv->fraction);
   gnc_commodity_set_cusip (dest, src_priv->cusip);