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@@ -153,7 +153,7 @@ class World
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// starting from tile number s0, find a path to tile number t
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// return true if such a path exists, false otherwise
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// if it exists the path is given in variable path (hence the reference &)
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- bool dfs(unsigned int s0, unsigned int target, list<unsigned int>& path, list<unsigned int>& discovered)
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+ const bool dfs(unsigned int s0, unsigned int target, list<unsigned int>& path, list<unsigned int>& discovered)
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{
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bool r = false;
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