Define Py_hash_t for versions that don't know it (#179)

Closes #178

Author: moble

setup.py

@@ -16,7 +16,7 @@
 
 
 # Set this first for easier replacement
-version = "2021.8.25.12.59.41"
+version = "2021.8.26.15.40.13"
 
 if "win" in platform.lower() and not "darwin" in platform.lower():
     extra_compile_args = ["/O2"]

src/numpy_quaternion.c

@@ -783,6 +783,9 @@ pyquaternion_richcompare(PyObject* a, PyObject* b, int op)
 #if PY_VERSION_HEX > 0x030a00a6
 #define _newpy_HashDouble _Py_HashDouble
 #else
+#if PY_VERSION_HEX < 0x030200a1
+#define Py_hash_t long
+#endif
 static NPY_INLINE Py_hash_t
 _newpy_HashDouble(PyObject *NPY_UNUSED(ignored), double val)
 {

src/quaternion/__init__.py

@@ -1,7 +1,7 @@
 # Copyright (c) 2020, Michael Boyle
 # See LICENSE file for details: <https://github.com/moble/quaternion/blob/main/LICENSE>
 
-__version__ = "2021.8.25.12.59.41"
+__version__ = "2021.8.26.15.40.13"
 __doc_title__ = "Quaternion dtype for NumPy"
 __doc__ = "Adds a quaternion dtype to NumPy."
 __all__ = ['quaternion',