app_python3: fix Python 3.7 deprecation warnings

- check for PY_VERSION_HEX >= 0x03070000

src/modules/app_python3/app_python3_mod.c

@@ -177,7 +177,11 @@ static int child_init(int rank)
 		return 0;
 	}
 	_apy_process_rank = rank;
+#if PY_VERSION_HEX >= 0x03070000
+	PyOS_AfterFork_Child();
+#else
 	PyOS_AfterFork();
+#endif
 	if (cfg_child_init()) {
 		return -1;
 	}
@@ -431,7 +435,11 @@ int apy_init_script(int rank)
 {
 	PyObject *pFunc, *pArgs, *pValue, *pResult;
 	int rval = -1;
+#if PY_VERSION_HEX >= 0x03070000
+	const char *classname;
+#else
 	char *classname;
+#endif
 	PyGILState_STATE gstate;
 
 

src/modules/app_python3/python_support.c

@@ -234,10 +234,18 @@ static char *make_message(const char *fmt, va_list ap)
 	return NULL;	// shall not happened, but who knows ;)
 }
 
+#if PY_VERSION_HEX >= 0x03070000
+const char *get_class_name(PyObject *y)
+#else
 char *get_class_name(PyObject *y)
+#endif
 {
 	PyObject *p;
+#if PY_VERSION_HEX >= 0x03070000
+	const char *name;
+#else
 	char *name;
+#endif
 
 	p = PyObject_GetAttrString(y, "__name__");
 	if (p == NULL || p == Py_None)
@@ -253,10 +261,18 @@ char *get_class_name(PyObject *y)
 }
 
 
+#if PY_VERSION_HEX >= 0x03070000
+const char *get_instance_class_name(PyObject *y)
+#else
 char *get_instance_class_name(PyObject *y)
+#endif
 {
 	PyObject *p, *n;
+#if PY_VERSION_HEX >= 0x03070000
+	const char *name;
+#else
 	char *name;
+#endif
 
 	n = PyObject_GetAttrString(y, "__class__");
 	if (n == NULL || n == Py_None)

src/modules/app_python3/python_support.h

@@ -30,7 +30,12 @@ PyObject *format_exc_obj;
 void python_handle_exception(const char *, ...);
 
 PyObject *InitTracebackModule(void);
+#if PY_VERSION_HEX >= 0x03070000
+const char *get_class_name(PyObject *);
+const char *get_instance_class_name(PyObject *);
+#else
 char *get_class_name(PyObject *);
 char *get_instance_class_name(PyObject *);
+#endif
 
 #endif