fix: Prüfe, ob 'data' wirklich dereferenziert werden kann

1 files changed, 6 insertions, 2 deletions

diff --git a/dlist.c b/dlist.c
index a2a5cfd..32258e8 100644
--- a/dlist.c
+++ b/dlist.c
@@ -112,7 +112,9 @@ dlist_pop_front(struct dlist *dlist, T *data)
                 else
                         element->next->prev = NULL;
 
-                *data = element->data;
+                if ( data != NULL ) {
+                        *data = element->data;
+                }
                 free(element);
 
                 return true;
@@ -134,7 +136,9 @@ dlist_pop_back(struct dlist *dlist, T *data)
                 else
                         element->prev->next = NULL;
 
-                *data = element->data;
+                if ( data != NULL ) {
+                        *data = element->data;
+                }
                 free(element);
 
                 return true;