only define zero constant when it is used

c77e7a4f · Benjamin Peterson · ce68c19e · c77e7a4f
Commit c77e7a4f authored Mar 15, 2014 by Benjamin Peterson
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Modules/_math.c Modules/_math.c +2 -0

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--- a/Modules/_math.c
+++ b/Modules/_math.c
@@ -22,7 +22,9 @@
 static const double ln2 = 6.93147180559945286227E-01;
 static const double two_pow_m28 = 3.7252902984619141E-09; /* 2**-28 */
 static const double two_pow_p28 = 268435456.0; /* 2**28 */
+#ifndef Py_NAN
 static const double zero = 0.0;
+#endif
 /* acosh(x)
 * Method :