Fwd: REWRITE_INVOKE_MAX and "query may contain cycles"

I've run into a situation where I need a RULE to execute more than 10 
(guaranteed non-cyclical) operations.

Outside of modifying the source every time I compile/install postgres 
(which is what I've done now), how can I redefine REWRITE_INVOKE_MAX?

Also, is there any possibility of making REWRITE_INVOKE_MAX a 
configurable number in some future version of postgres?

FWIW, I'm (still) using 7.2.3 on unix.

thanks!

eric