renderer: split destroy program out from free programs

Split out from Marc-André's larger patchset.

src/vrend_renderer.c

@@ -855,28 +855,32 @@ static struct vrend_linked_shader_program *lookup_shader_program(struct vrend_co
   return 0;
 }
 
-static void vrend_free_programs(struct vrend_sub_context *sub)
+static void vrend_destroy_program(struct vrend_linked_shader_program *ent)
 {
-   struct vrend_linked_shader_program *ent, *tmp;
     int i;
-   if (LIST_IS_EMPTY(&sub->programs))
-	return;
-
-   LIST_FOR_EACH_ENTRY_SAFE(ent, tmp, &sub->programs, head) {
     glDeleteProgram(ent->id);
     list_del(&ent->head);
 
     for (i = PIPE_SHADER_VERTEX; i <= PIPE_SHADER_GEOMETRY; i++) {
-//         vrend_shader_state_reference(&ent->ss[i], NULL);
 	free(ent->shadow_samp_mask_locs[i]);
 	free(ent->shadow_samp_add_locs[i]);
 	free(ent->samp_locs[i]);
 	free(ent->const_locs[i]);
 	free(ent->ubo_locs[i]);
-
     }
     free(ent->attrib_locs);
     free(ent);
+}
+
+static void vrend_free_programs(struct vrend_sub_context *sub)
+{
+   struct vrend_linked_shader_program *ent, *tmp;
+
+   if (LIST_IS_EMPTY(&sub->programs))
+	return;
+
+   LIST_FOR_EACH_ENTRY_SAFE(ent, tmp, &sub->programs, head) {
+       vrend_destroy_program(ent);
    }
 }