wined3d: Do not bind buffers in state_cb() if the shader is not set.

dlls/wined3d/cs.c

@@ -1768,6 +1768,9 @@ static void wined3d_cs_exec_set_shader(struct wined3d_cs *cs, const void *data)
 {
     const struct wined3d_cs_set_shader *op = data;
 
+    /* CB binding may have been skipped earlier if the shader wasn't set, so make it happen. */
+    if (!cs->state.shader[op->type] && op->shader)
+        device_invalidate_state(cs->c.device, STATE_CONSTANT_BUFFER(op->type));
     cs->state.shader[op->type] = op->shader;
     device_invalidate_state(cs->c.device, STATE_SHADER(op->type));
     if (op->type != WINED3D_SHADER_TYPE_COMPUTE)

dlls/wined3d/state.c

@@ -4579,6 +4579,10 @@ static void state_cb(struct wined3d_context *context, const struct wined3d_state
     else
         shader_type = WINED3D_SHADER_TYPE_COMPUTE;
 
+    /* If a shader has not been set, buffer objects are not yet initialised. */
+    if (!state->shader[shader_type])
+        return;
+
     wined3d_gl_limits_get_uniform_block_range(&gl_info->limits, shader_type, &base, &count);
     for (i = 0; i < count; ++i)
     {