[patch] int -> size_t build correction

[Richard Todd]

CVS guile doesn't build cleanly for me right now, because of some 
'int's in srfi-13.c where size_t's were expected.  A patch is attached. 
 I glanced through the code and didn't see anywhere where it would 
depend on those variables being signed, and 'make check' passes for me, 
so I think it's good.

thanks,
Richard

size_t.patch
Description: Binary data