nir: Add a nir_foreach_function_temp_variable helper

Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5966>

src/compiler/nir/nir_print.c

@@ -1431,7 +1431,7 @@ print_function_impl(nir_function_impl *impl, print_state *state)
 
    fprintf(fp, "{\n");
 
-   nir_foreach_variable(var, &impl->locals) {
+   nir_foreach_function_temp_variable(var, impl) {
       fprintf(fp, "\t");
       print_var_decl(var, state);
    }