Redefine PyIndex_Check in memoryview utility

Cython/Utility/MemoryView_C.c

@@ -116,6 +116,11 @@ static CYTHON_INLINE int __pyx_sub_acquisition_count_locked(__pyx_atomic_int *ac
 static CYTHON_INLINE void __Pyx_INC_MEMVIEW({{memviewslice_name}} *, int, int);
 static CYTHON_INLINE void __Pyx_XDEC_MEMVIEW({{memviewslice_name}} *, int, int);
 
+#if PY_VERSION_HEX < 0x02050000
+    /* NumPy headers define PyIndex_Check incorrectly */
+    #undef PyIndex_Check
+    #define PyIndex_Check(o) (PyNumber_Check(o) && !PyFloat_Check(o) && !PyComplex_Check(o))
+#endif
 /////////////// MemviewSliceIndex.proto ///////////////
 static CYTHON_INLINE char *__pyx_memviewslice_index_full(const char *bufp, Py_ssize_t idx, Py_ssize_t stride, Py_ssize_t suboffset);