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.

Mac/Modules/drag/dragscan.py

@@ -25,6 +25,8 @@ def main():
 	scanner = MyScanner(input, output, defsoutput)
 	scanner.scan()
 	scanner.close()
+	print "=== Testing definitions output code ==="
+	execfile(defsoutput, {}, {})
 	print "=== Done scanning and generating, now doing 'import dragsupport' ==="
 	import dragsupport
 	print "=== Done.  It's up to you to compile Dragmodule.c ==="