bpo-43916: Move the _PyStructSequence_InitType function to the internal API (GH-25854)

diff --git a/Modules/_cursesmodule.c b/Modules/_cursesmodule.c
index bcf9ad1..b6b7ca4 100644
--- a/Modules/_cursesmodule.c
+++ b/Modules/_cursesmodule.c
@@ -104,7 +104,7 @@ static const char PyCursesVersion[] = "2.2";
 
 #include "Python.h"
 #include "pycore_long.h"          // _PyLong_GetZero()
-
+#include "pycore_structseq.h"     // PyStructSequence_InitType()
 
 #ifdef __hpux
 #define STRICT_SYSV_CURSES