./configure issue with fresh cvs checkout.

I am having an issue with ./configure on a fresh copy of the source from phpdoc. The issue is coming about because of the file ./scripts/missing-entities.php. When the exec line is called which runs /usr/bin/onsgml it fails. The reason it is failing is because the exec line doesn't seem to like having a space in front of the commandline ie " /usr/bin .... ". This space is caused by my system not needing any SP_OPTIONS before the command line. Shouldn't we put a little logic in the line to make sure there is no whitespace at the front of the command before it is exec'd? I could easily implement the fix in a matter of seconds, but I wanted to check and see if anyone else is having the problem before I go and change anything. -Jeremy