adding math.h, ensuring that NAN is defined

realead · realead · commit 0cf411d03f08 · 2018-07-15T12:57:34.000+02:00
diff --git a/pandas/_libs/src/klib/khash_python.h b/pandas/_libs/src/klib/khash_python.h
@@ -1,4 +1,5 @@
 #include <string.h>
+#include <math.h>
 #include <Python.h>
 
 #include "khash.h"
