gallium/hud: increase the vertex buffer size for text

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
diff --git a/src/gallium/auxiliary/hud/hud_context.c b/src/gallium/auxiliary/hud/hud_context.c
index 805e1a7..7fa62a9 100644
--- a/src/gallium/auxiliary/hud/hud_context.c
+++ b/src/gallium/auxiliary/hud/hud_context.c
@@ -566,7 +566,7 @@
    /* prepare vertex buffers */
    hud_alloc_vertices(hud, &hud->bg, 4 * 256, 2 * sizeof(float));
    hud_alloc_vertices(hud, &hud->whitelines, 4 * 256, 2 * sizeof(float));
-   hud_alloc_vertices(hud, &hud->text, 4 * 1024, 4 * sizeof(float));
+   hud_alloc_vertices(hud, &hud->text, 16 * 1024, 4 * sizeof(float));
 
    /* prepare all graphs */
    hud_batch_query_update(hud->batch_query);