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ref: 87b2758b9c5459eae825d0642eb4c057e8c5c6fd
parent: 9b1b7e0f3a6858da2bdd3d855a1a9c2801122f30
author: Jonas Kölker <jonaskoelker@yahoo.com>
date: Mon Sep 21 12:21:48 EDT 2015

Fix a memory leak in Range's find_errors.

Only occurred in invalid instances, such as 3x1:1b when you put a
black in the middle square.

--- a/range.c

+++ b/range.c

@@ -1451,7 +1451,7 @@

         int biggest, canonical;

         if (!report) {

-            printf("dfs fail at %d\n", any_white_cell);

+            sfree(dsf);

             goto found_error;

         }