LP:782433 - free() of memory containing active spinlock

xt_heap_release() does not release spinlock hp->h_lock that is initialized in xt_heap_new().

This makes Windows application verifier unhappy.

Fix:
— storage/pbxt/src/heap_xt.cc 2009-11-24 10:55:06 +0000
+++ storage/pbxt/src/heap_xt.cc 2011-05-13 17:03:23 +0000
@@ -109,6 +109,7 @@
if (hp->h_finalize)
(*hp->h_finalize)(self, hp);
xt_spinlock_unlock(&hp->h_lock);
+ xt_spinlock_free(NULL, &hp->h_lock);
xt_free(self, hp);
return;
}