Add DL_EXPORT() to all modules that could possibly be used
on BeOS or Windows.
diff --git a/Modules/pwdmodule.c b/Modules/pwdmodule.c
index 732e4dc..00522b9 100644
--- a/Modules/pwdmodule.c
+++ b/Modules/pwdmodule.c
@@ -164,7 +164,7 @@
 	{NULL,		NULL}		/* sentinel */
 };
 
-void
+DL_EXPORT(void)
 initpwd()
 {
 	Py_InitModule4("pwd", pwd_methods, pwd__doc__,