PyAPI: add PyC_Err_SetString_Prefix for internal use

source/blender/python/generic/py_capi_utils.c

@@ -455,6 +455,11 @@ PyObject *PyC_Err_Format_Prefix(PyObject *exception_type_prefix, const char *for
 	return NULL;
 }
 
+PyObject *PyC_Err_SetString_Prefix(PyObject *exception_type_prefix, const char *str)
+{
+	return PyC_Err_Format_Prefix(exception_type_prefix, "%s", str);
+}
+
 /**
  * Use for Python callbacks run directly from C,
  * when we can't use normal methods of raising exceptions.

source/blender/python/generic/py_capi_utils.h

@@ -38,7 +38,10 @@ PyObject *PyC_ExceptionBuffer(void);
 PyObject *PyC_ExceptionBuffer_Simple(void);
 PyObject *PyC_Object_GetAttrStringArgs(PyObject *o, Py_ssize_t n, ...);
 PyObject *PyC_FrozenSetFromStrings(const char **strings);
+
 PyObject *PyC_Err_Format_Prefix(PyObject *exception_type_prefix, const char *format, ...);
+PyObject *PyC_Err_SetString_Prefix(PyObject *exception_type_prefix, const char *str);
+
 void      PyC_Err_PrintWithFunc(PyObject *py_func);
 
 void	PyC_FileAndNum(const char **filename, int *lineno);