use unsigned for wxString [] operator
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1054 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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@@ -222,7 +222,7 @@ public:
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protected:
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static bool IsImmutable(const wxString& key)
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{ return key[0] == wxCONFIG_IMMUTABLE_PREFIX; }
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{ return key[0u] == wxCONFIG_IMMUTABLE_PREFIX; }
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private:
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// are we doing automatic environment variable expansion?
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