Properly detect stream pointers to avaid crashes on freeing.`

diff --git a/libcitadel/lib/stringbuf.c b/libcitadel/lib/stringbuf.c
index 7b2c663656e08fd874d788250c80a5333acd2877..5cbe17fdb560b003b3e3d25136e2ac73497e3da6 100644 (file)
--- a/libcitadel/lib/stringbuf.c
+++ b/libcitadel/lib/stringbuf.c
@@ -2931,7 +2931,7 @@ void *StrBufNewStreamContext(eStreamType type)
 
 void StrBufDestroyStreamContext(eStreamType type, void **vStream)
 {
-       if (*vStream) {
+       if ((vStream == NULL) || (*vStream==NULL)) {
                return;
        }
        switch (type)