Hi,

It turns out that my recent patch to correct a dangling pointer in 
sid/component/cfgroot/libltdl causes an infinite loop in the case that a 
resident dynamic library is in use by SID. I've committed the attached 
patch which corrects the problem. It also improves efficiency by only 
checking whether 'cur' is still in the linked list in the case that 
lt_dlclose was called.

Dave