lib: str_free(NULL) should be a no-op

diff --git a/src/lib/str.c b/src/lib/str.c
index 5af92f43ddf0fb08ef003e136a86d61f15255bd8..af2c24807b4d2c87c36fe9beb6b116b06e96c17c 100644 (file)
--- a/src/lib/str.c
+++ b/src/lib/str.c
@@ -39,6 +39,9 @@ string_t *t_str_new_const(const char *str, size_t len)
 
 void str_free(string_t **str)
 {
+       if (str == NULL || *str == NULL)
+               return;
+
        buffer_free(str);
 }