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

diff --git a/src/lib/buffer.c b/src/lib/buffer.c
index 0668ad3bed8456d48f2cff4b3272dd2e38017585..7ea84100ac0528475eefc5eea34584b809eb1fa8 100644 (file)
--- a/src/lib/buffer.c
+++ b/src/lib/buffer.c
@@ -148,6 +148,9 @@ void buffer_free(buffer_t **_buf)
 {
        struct real_buffer *buf = (struct real_buffer *)*_buf;
 
+       if (buf == NULL)
+               return;
+
        *_buf = NULL;
        if (buf->alloced)
                p_free(buf->pool, buf->w_buffer);