(Possibly) correct use of Python memory APIs.

Fix SF bug #516768 reported by Dave Wallace.

Replace use of PyMem_DEL() with PyObject_Del() on object dealloc
functions.  The use of PyMem_DEL() is incorrect for object
deallocation, because it only ever calls the low-level free().  If a
custom allocator like pymalloc is used, it needs to be called to free
the memory.

Also replace bare malloc() and realloc() with PyMem_Malloc() and
PyMem_Realloc().  I think this isn't a strict bug fix, but a would be
nice.  It guarantees that BTrees objects get their memory from the
same allocator as the Python core.

src/BTrees/BTreeItemsTemplate.c

@@ -12,7 +12,7 @@
   
  ****************************************************************************/
 
-#define BTREEITEMSTEMPLATE_C "$Id: BTreeItemsTemplate.c,v 1.8 2002/02/11 23:40:40 gvanrossum Exp $\n"
+#define BTREEITEMSTEMPLATE_C "$Id: BTreeItemsTemplate.c,v 1.9 2002/03/08 18:33:01 jeremy Exp $\n"
 
 typedef struct {
   PyObject_HEAD
@@ -38,7 +38,7 @@ BTreeItems_dealloc(BTreeItems *self)
   Py_XDECREF(self->firstbucket);
   Py_XDECREF(self->lastbucket);
   Py_XDECREF(self->currentbucket);
-  PyMem_DEL(self);
+  PyObject_DEL(self);
 }
 
 static int 

src/BTrees/BTreeModuleTemplate.c

@@ -211,7 +211,7 @@ PyMalloc(size_t sz)
 
   ASSERT(sz > 0, "non-positive size malloc", NULL);
 
-  if ((r=malloc(sz))) return r;
+  if ((r=PyMem_Malloc(sz))) return r;
 
   PyErr_NoMemory();
   return NULL;
@@ -224,8 +224,8 @@ PyRealloc(void *p, size_t sz)
 
   ASSERT(sz > 0, "non-positive size realloc", NULL);
 
-  if (p) r=realloc(p,sz);
-  else r=malloc(sz);
+  if (p) r=PyMem_Realloc(p,sz);
+  else r=PyMem_Malloc(sz);
 
   UNLESS (r) PyErr_NoMemory();
 
@@ -270,7 +270,7 @@ static char BTree_module_documentation[] =
 "\n"
 MASTER_ID
 BTREEITEMSTEMPLATE_C
-"$Id: BTreeModuleTemplate.c,v 1.20 2002/02/21 21:41:17 jeremy Exp $\n"
+"$Id: BTreeModuleTemplate.c,v 1.21 2002/03/08 18:33:01 jeremy Exp $\n"
 BTREETEMPLATE_C
 BUCKETTEMPLATE_C
 KEYMACROS_H

src/BTrees/BTreeTemplate.c

@@ -12,7 +12,7 @@
   
  ****************************************************************************/
 
-#define BTREETEMPLATE_C "$Id: BTreeTemplate.c,v 1.24 2002/02/28 20:12:00 jeremy Exp $\n"
+#define BTREETEMPLATE_C "$Id: BTreeTemplate.c,v 1.25 2002/03/08 18:33:01 jeremy Exp $\n"
 
 /*
 ** _BTree_get
@@ -1242,7 +1242,7 @@ BTree_dealloc(BTree *self)
   PER_DEL(self);
 
   Py_DECREF(self->ob_type);
-  PyMem_DEL(self);
+  PyObject_Del(self);
 }
 
 static int

src/BTrees/BucketTemplate.c

@@ -12,7 +12,7 @@
   
  ****************************************************************************/
 
-#define BUCKETTEMPLATE_C "$Id: BucketTemplate.c,v 1.27 2002/02/21 21:41:17 jeremy Exp $\n"
+#define BUCKETTEMPLATE_C "$Id: BucketTemplate.c,v 1.28 2002/03/08 18:33:01 jeremy Exp $\n"
 
 /*
 ** _bucket_get
@@ -1137,7 +1137,7 @@ Bucket_dealloc(Bucket *self)
   PER_DEL(self);
 
   Py_DECREF(self->ob_type);
-  PyMem_DEL(self);
+  PyObject_Del(self);
 }
 
 /* Code to access Bucket objects as mappings */