Excise DL_EXPORT/DL_IMPORT from Modules/*.  Required adding a prototype
for Py_Main().

Thanks to Kalle Svensson and Skip Montanaro for the patches.
diff --git a/Modules/dbmmodule.c b/Modules/dbmmodule.c
index dde5b49..d05a1bd 100644
--- a/Modules/dbmmodule.c
+++ b/Modules/dbmmodule.c
@@ -339,7 +339,7 @@
 	{ 0, 0 },
 };
 
-DL_EXPORT(void)
+PyMODINIT_FUNC
 initdbm(void) {
 	PyObject *m, *d, *s;