Fix syntax

tools/benchcomp/benchcomp/visualizers/__init__.py

@@ -328,6 +328,7 @@ def _organize_results_into_metrics(results, log_scaling):
                         ret[metric][bench] = {
                             variant: variant_result["metrics"][metric]
                         }
+        ret_scaled = {}
         for metric, bench_result in ret.items():
             scaled = dump_markdown_results_table._compute_scaled_metric(
                     bench_result, log_scaling)