wined3d: Make a couple of variables const.

dlls/wined3d/shader_spirv.c

@@ -613,7 +613,7 @@ static bool shader_spirv_resource_bindings_init(struct shader_spirv_resource_bin
         struct wined3d_shader_resource_bindings *wined3d_bindings,
         const struct wined3d_state *state, uint32_t shader_mask)
 {
-    struct vkd3d_shader_scan_descriptor_info *descriptor_info;
+    const struct vkd3d_shader_scan_descriptor_info *descriptor_info;
     enum wined3d_shader_descriptor_type wined3d_type;
     enum vkd3d_shader_visibility shader_visibility;
     enum wined3d_shader_type shader_type;
@@ -652,7 +652,7 @@ static bool shader_spirv_resource_bindings_init(struct shader_spirv_resource_bin
 
         for (i = 0; i < descriptor_info->descriptor_count; ++i)
         {
-            struct vkd3d_shader_descriptor_info *d = &descriptor_info->descriptors[i];
+            const struct vkd3d_shader_descriptor_info *d = &descriptor_info->descriptors[i];
             uint32_t flags;
 
             if (d->register_space)