put PyImportErrorObject with its brothers

Include/pyerrors.h

@@ -26,6 +26,13 @@ typedef struct {
     PyObject *print_file_and_line;
 } PySyntaxErrorObject;
 
+typedef struct {
+    PyException_HEAD
+    PyObject *msg;
+    PyObject *name;
+    PyObject *path;
+} PyImportErrorObject;
+
 typedef struct {
     PyException_HEAD
     PyObject *encoding;
@@ -231,13 +238,6 @@ PyAPI_FUNC(PyObject *) PyErr_Format(
     ...
     );
 
-typedef struct {
-    PyException_HEAD
-    PyObject *msg;
-    PyObject *name;
-    PyObject *path;
-} PyImportErrorObject;
-
 #ifdef MS_WINDOWS
 PyAPI_FUNC(PyObject *) PyErr_SetFromWindowsErrWithFilename(
     int ierr,