__builtins__ mods (and sys_checkinterval for ceval.c)
diff --git a/Python/import.c b/Python/import.c
index ef24883..1d9ea35 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -32,6 +32,7 @@
 #include "import.h"
 #include "errcode.h"
 #include "sysmodule.h"
+#include "bltinmodule.h"
 #include "pythonrun.h"
 #include "marshal.h"
 #include "compile.h"
@@ -147,6 +148,10 @@
 	if (m == NULL)
 		return NULL;
 	d = getmoduledict(m);
+	if (dictlookup(d, "__builtins__") == NULL) {
+		if (dictinsert(d, "__builtins__", getbuiltindict()) != 0)
+			return NULL;
+	}
 	v = eval_code((codeobject *)co, d, d, d, (object *)NULL);
 	if (v == NULL)
 		return NULL;