Don't export internal symbols ("make smelly")

Python/errors.c

@@ -1014,7 +1014,7 @@ PyErr_SyntaxLocationEx(const char *filename, int lineno, int col_offset)
    XXX The functionality of this function is quite similar to the
    functionality in tb_displayline() in traceback.c. */
 
-PyObject *
+static PyObject *
 err_programtext(FILE *fp, int lineno)
 {
     int i;

Python/fileutils.c

@@ -566,7 +566,7 @@ _Py_stat(PyObject *path, struct stat *statbuf)
 
 #endif
 
-int
+static int
 get_inheritable(int fd, int raise)
 {
 #ifdef MS_WINDOWS