softpipe: added null ptr check for align_free() call in vbuf code

Fixes GALLIUM_NOCELL path.  See bug 20475.

diff --git a/src/gallium/drivers/softpipe/sp_prim_vbuf.c b/src/gallium/drivers/softpipe/sp_prim_vbuf.c
index eef6e5806c95095bae584fac4d332f9baa29300c..e2b6a041b38d87e8077119a1c96ad7e8453aa044 100644 (file)
--- a/src/gallium/drivers/softpipe/sp_prim_vbuf.c
+++ b/src/gallium/drivers/softpipe/sp_prim_vbuf.c
@@ -90,7 +90,8 @@ sp_vbuf_allocate_vertices(struct vbuf_render *vbr,
    unsigned size = vertex_size * nr_vertices;
 
    if (cvbr->vertex_buffer_size < size) {
-      align_free(cvbr->vertex_buffer);
+      if (cvbr->vertex_buffer)
+         align_free(cvbr->vertex_buffer);
       cvbr->vertex_buffer = align_malloc(size, 16);
       cvbr->vertex_buffer_size = size;
    }