gallium: Detect if a null buffer is passed.

diff --git a/src/mesa/pipe/pipebuffer/pb_buffer_fenced.c b/src/mesa/pipe/pipebuffer/pb_buffer_fenced.c
index e69f88a323a87d81b606499d71a90a69078e1b2d..dfb80b1dcf4129c1ee0c9516fd4cb234633d429b 100644 (file)
--- a/src/mesa/pipe/pipebuffer/pb_buffer_fenced.c
+++ b/src/mesa/pipe/pipebuffer/pb_buffer_fenced.c
@@ -230,6 +230,9 @@ fenced_buffer_create(struct fenced_buffer_list *fenced_list,
 {
    struct fenced_buffer *buf;
    
+   if(!buffer)
+      return NULL;
+   
    buf = (struct fenced_buffer *)calloc(1, sizeof(struct fenced_buffer));
    if(!buf)
       return NULL;