Fix a warning.

cc6af505 · Victor Zverovich · e6521448 · cc6af505
Commit cc6af505 authored Dec 10, 2013 by Victor Zverovich
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format.cc format.cc +1 -1

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--- a/format.cc
+++ b/format.cc
@@ -396,7 +396,7 @@ inline const typename fmt::BasicFormatter<Char>::Arg
 template <typename Char>
 void fmt::BasicFormatter<Char>::CheckSign(const Char *&s, const Arg &arg) {
-  char sign = *s;
+  char sign = static_cast<char>(*s);
  if (arg.type > LAST_NUMERIC_TYPE) {
    ReportError(s,
        Format("format specifier '{}' requires numeric argument") << sign);