Bug 798221 - Transfer funds between accounts with different currencies crashes Gnucash on macOS

In the scrub function find_account_matching_name_in_list there was a
test for account names being the same for currency but condition was
backwards so was matching on account names being different. There was
also a g_list_free resulting in a double free which was removed.

libgnucash/engine/Scrub.c

@@ -1434,11 +1434,8 @@ find_account_matching_name_in_list (GList *acc_list, const char* accname)
     {
         Account *acc = GNC_ACCOUNT (node->data);
         if (G_UNLIKELY (!acc)) continue;
-        if (g_strcmp0 (accname, xaccAccountGetName(acc)))
-        {
-            g_list_free (acc_list);
+        if (g_strcmp0 (accname, xaccAccountGetName (acc)) == 0)
             return acc;
-        }
     }
     return NULL;
 }