Issue #20221: Removed conflicting (or circular) hypot definition
when compiled with VS 2010 or above.  Initial patch by Tabrez Mohammed.
diff --git a/PC/pyconfig.h b/PC/pyconfig.h
index 299527d..ccf75f3 100644
--- a/PC/pyconfig.h
+++ b/PC/pyconfig.h
@@ -207,7 +207,11 @@
 #define Py_IS_INFINITY(X) (!_finite(X) && !_isnan(X))
 #define Py_IS_FINITE(X) _finite(X)
 #define copysign _copysign
+
+/* VS 2010 and above already defines hypot as _hypot */
+#if _MSC_VER < 1600
 #define hypot _hypot
+#endif
 
 /* Side by Side assemblies supported in VS 2005 and VS 2008 but not 2010*/
 #if _MSC_VER >= 1400 && _MSC_VER < 1600