st/nine: Create pipe_surfaces on resource creation.

Create the pipe_surfaces on renderable resources creation.

This enables to avoid creating them on the fly.

Signed-off-by: Axel Davy <axel.davy@ens.fr>
diff --git a/src/gallium/state_trackers/nine/surface9.c b/src/gallium/state_trackers/nine/surface9.c
index 8fa70a7..0ce4122 100644
--- a/src/gallium/state_trackers/nine/surface9.c
+++ b/src/gallium/state_trackers/nine/surface9.c
@@ -185,6 +185,11 @@
     if (This->base.resource && (pDesc->Usage & D3DUSAGE_DYNAMIC))
         This->base.resource->flags |= NINE_RESOURCE_FLAG_LOCKABLE;
 
+    if (This->base.resource && (pDesc->Usage & (D3DUSAGE_RENDERTARGET | D3DUSAGE_DEPTHSTENCIL))) {
+        (void) NineSurface9_CreatePipeSurface(This, 0);
+        (void) NineSurface9_CreatePipeSurface(This, 1);
+    }
+
     /* TODO: investigate what else exactly needs to be cleared */
     if (This->base.resource && (pDesc->Usage & D3DUSAGE_RENDERTARGET)) {
         surf = NineSurface9_GetSurface(This, 0);
@@ -748,6 +753,10 @@
 
     pipe_surface_reference(&This->surface[0], NULL);
     pipe_surface_reference(&This->surface[1], NULL);
+    if (resource) {
+        (void) NineSurface9_CreatePipeSurface(This, 0);
+        (void) NineSurface9_CreatePipeSurface(This, 1);
+    }
 }
 
 
diff --git a/src/gallium/state_trackers/nine/surface9.h b/src/gallium/state_trackers/nine/surface9.h
index 856c03b..d43739b 100644
--- a/src/gallium/state_trackers/nine/surface9.h
+++ b/src/gallium/state_trackers/nine/surface9.h
@@ -94,9 +94,8 @@
 static inline struct pipe_surface *
 NineSurface9_GetSurface( struct NineSurface9 *This, int sRGB )
 {
-    if (This->surface[sRGB])
-        return This->surface[sRGB];
-    return NineSurface9_CreatePipeSurface(This, sRGB);
+    assert(This->surface[sRGB]);
+    return This->surface[sRGB];
 }
 
 static inline struct pipe_resource *