Cleanup: py-gpu error checks

Move gpu initialization checks to the start of each function instead
of mixing with argument parsing.

source/blender/python/gpu/gpu_py_element.c

@@ -47,6 +47,8 @@
 
 static PyObject *bpygpu_IndexBuf_new(PyTypeObject *UNUSED(type), PyObject *args, PyObject *kwds)
 {
+	BPYGPU_IS_INIT_OR_ERROR_OBJ;
+
 	const char *error_prefix = "IndexBuf.__new__";
 	bool ok = true;
 
@@ -61,8 +63,7 @@ static PyObject *bpygpu_IndexBuf_new(PyTypeObject *UNUSED(type), PyObject *args,
 
 	static const char *_keywords[] = {"type", "seq", NULL};
 	static _PyArg_Parser _parser = {"$O&O:IndexBuf.__new__", _keywords, 0};
-	if (!bpygpu_is_initialized() ||
-	    !_PyArg_ParseTupleAndKeywordsFast(
+	if (!_PyArg_ParseTupleAndKeywordsFast(
 	        args, kwds, &_parser,
 	        bpygpu_ParsePrimType, &params.type_id,
 	        &params.seq))