fix walking code trying to dereference some NULL pointers

diff --git a/walk.c b/walk.c
index e213f2b..4ed3156 100644 (file)
--- a/walk.c
+++ b/walk.c
@@ -196,7 +196,8 @@ static void walk_designator(const designator_t *designator,
                             const walk_env_t *const env)
 {
        for ( ; designator != NULL; designator = designator->next) {
-               walk_expression(designator->array_index, env);
+               if (designator->array_index != NULL)
+                       walk_expression(designator->array_index, env);
        }
 }
 
@@ -237,7 +238,8 @@ static void walk_entity(entity_t *entity, const walk_env_t *const env)
                return;
        }
        case ENTITY_ENUM_VALUE:
-               walk_expression(entity->enum_value.value, env);
+               if (entity->enum_value.value != NULL)
+                       walk_expression(entity->enum_value.value, env);
                return;
        case ENTITY_TYPEDEF:
                walk_type(entity->typedefe.type, env);