After generating the Python file with definitions try to run it, so
we catch errors during the build process in stead of later during runtime.
diff --git a/Mac/Modules/ae/aescan.py b/Mac/Modules/ae/aescan.py
index b406ce7..3a59ec8 100644
--- a/Mac/Modules/ae/aescan.py
+++ b/Mac/Modules/ae/aescan.py
@@ -20,6 +20,8 @@
 	scanner = AppleEventsScanner(input, output, defsoutput)
 	scanner.scan()
 	scanner.close()
+	print "=== Testing definitions output code ==="
+	execfile(defsoutput, {}, {})
 	print "=== Done Scanning and Generating, now doing 'import aesupport' ==="
 	import aesupport
 	print "=== Done 'import aesupport'.  It's up to you to compile AEmodule.c ==="