Double free or memory corruption using dynamic discovery

Reported by Ralf 2012-02-16.

Feb 16 15:10:45 2012: clienradputudp: sent UDP of length 217 to [scrubbed] port 1812
Feb 16 15:10:45 2012: freerealm: called with refcount 4
Feb 16 15:10:45 2012: freerealm: called with refcount 3
Feb 16 15:10:45 2012: freerealm: called with refcount 2
Feb 16 15:10:45 2012: freerealm: called with refcount 1
Feb 16 15:10:45 2012: freerealm: called with refcount 99
Feb 16 15:10:45 2012: freerealm: called with refcount 4
[repeated 93 times]
*** glibc detected *** /usr/local/sbin/radsecproxy: double free or corruption (!prev): 0x09012228 ***
======= Backtrace: =========
/lib/libc.so.6[0x40274935]
/lib/libc.so.6(cfree+0x9c)[0x402767dc]
/usr/local/sbin/radsecproxy[0x804bcb4]
/usr/local/sbin/radsecproxy[0x8051cac]
/lib/libpthread.so.0[0x401f7f3b]
/lib/libc.so.6(clone+0x5e)[0x402d4d0e]