i965: get shared_size from shader_info rather than gl_shader_program

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
diff --git a/src/mesa/drivers/dri/i965/brw_cs.c b/src/mesa/drivers/dri/i965/brw_cs.c
index e4d82cf..522ddb9 100644
--- a/src/mesa/drivers/dri/i965/brw_cs.c
+++ b/src/mesa/drivers/dri/i965/brw_cs.c
@@ -68,7 +68,7 @@
 
    memset(&prog_data, 0, sizeof(prog_data));
 
-   if (prog->Comp.SharedSize > 64 * 1024) {
+   if (cp->program.info.cs.shared_size > 64 * 1024) {
       prog->data->LinkStatus = false;
       const char *error_str =
          "Compute shader used more than 64KB of shared variables";
@@ -78,7 +78,7 @@
       ralloc_free(mem_ctx);
       return false;
    } else {
-      prog_data.base.total_shared = prog->Comp.SharedSize;
+      prog_data.base.total_shared = cp->program.info.cs.shared_size;
    }
 
    assign_cs_binding_table_offsets(devinfo, prog, &cp->program, &prog_data);