Avoid unnecessary g_list_length in equality functions

libgnucash/engine/qofquery.cpp

@@ -1458,23 +1458,26 @@ gboolean qof_query_equal (const QofQuery *q1, const QofQuery *q2)
     if (q1 == q2) return TRUE;
     if (!q1 || !q2) return FALSE;
 
-    if (g_list_length (q1->terms) != g_list_length (q2->terms)) return FALSE;
     if (q1->max_results != q2->max_results) return FALSE;
 
-    for (or1 = q1->terms, or2 = q2->terms; or1;
-            or1 = or1->next, or2 = or2->next)
+    for (or1 = q1->terms, or2 = q2->terms; or1 || or2;
+         or1 = or1->next, or2 = or2->next)
     {
         GList *and1, *and2;
 
+        if (!or1 || !or2)
+            return FALSE;
         and1 = static_cast<GList*>(or1->data);
         and2 = static_cast<GList*>(or2->data);
 
-        if (g_list_length (and1) != g_list_length (and2)) return FALSE;
-
-        for ( ; and1; and1 = and1->next, and2 = and2->next)
+        for (; and1 || and2; and1 = and1->next, and2 = and2->next)
+        {
+            if (!and1 || !and2)
+                return FALSE;
             if (!qof_query_term_equal (static_cast<QofQueryTerm*>(and1->data),
 				       static_cast<QofQueryTerm*>(and2->data)))
                 return FALSE;
+        }
     }
 
     if (!qof_query_sort_equal (&(q1->primary_sort), &(q2->primary_sort)))

libgnucash/engine/qofquerycore.cpp

@@ -732,9 +732,10 @@ guid_predicate_equal (const QofQueryPredData *p1, const QofQueryPredData *p2)
     GList *l1 = pd1->guids, *l2 = pd2->guids;
 
     if (pd1->options != pd2->options) return FALSE;
-    if (g_list_length (l1) != g_list_length (l2)) return FALSE;
-    for ( ; l1 ; l1 = l1->next, l2 = l2->next)
+    for (; l1 || l2; l1 = l1->next, l2 = l2->next)
     {
+        if (!l1 || !l2)
+            return FALSE;
         if (!guid_equal (static_cast<GncGUID*>(l1->data),
 			 static_cast<GncGUID*>(l2->data)))
             return FALSE;
@@ -1525,9 +1526,10 @@ choice_predicate_equal (const QofQueryPredData *p1, const QofQueryPredData *p2)
     GList *l1 = pd1->guids, *l2 = pd2->guids;
 
     if (pd1->options != pd2->options) return FALSE;
-    if (g_list_length (l1) != g_list_length (l2)) return FALSE;
-    for ( ; l1 ; l1 = l1->next, l2 = l2->next)
+    for (; l1 || l2; l1 = l1->next, l2 = l2->next)
     {
+        if (!l1 || !l2)
+            return FALSE;
         if (!guid_equal (static_cast<GncGUID*>(l1->data),
 			 static_cast<GncGUID*>(l2->data)))
             return FALSE;