Suppress a warning

b53994fd · vitaut · fd175348 · b53994fd
Commit b53994fd authored Nov 20, 2015 by vitaut
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format.h format.h +2 -1

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--- a/format.h
+++ b/format.h
@@ -608,7 +608,8 @@ inline int getsign(double x) {
    _ecvt_s(buffer, sizeof(buffer), x, 0, &dec, &sign);
    return sign;
  }
-  ecvt(x, 0, &dec, &sign);
+  char *result = ecvt(x, 0, &dec, &sign);
+  (void)result;  // Suppress warning about unused return value of ecvt.
  return sign;
 }