Add the experimental create_collation_x() api. (CVS 3934)

FossilOrigin-Name: ff49d48f2f025898a0f4ace1fc227e1d367ea89f
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index c5917c6..374f1eb 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -11,7 +11,7 @@
 *************************************************************************
 ** Internal interface definitions for SQLite.
 **
-** @(#) $Id: sqliteInt.h,v 1.557 2007/05/05 11:48:54 drh Exp $
+** @(#) $Id: sqliteInt.h,v 1.558 2007/05/07 09:32:45 danielk1977 Exp $
 */
 #ifndef _SQLITEINT_H_
 #define _SQLITEINT_H_
@@ -646,11 +646,12 @@
 ** collating sequence may not be read or written.
 */
 struct CollSeq {
-  char *zName;         /* Name of the collating sequence, UTF-8 encoded */
-  u8 enc;              /* Text encoding handled by xCmp() */
-  u8 type;             /* One of the SQLITE_COLL_... values below */
-  void *pUser;         /* First argument to xCmp() */
+  char *zName;          /* Name of the collating sequence, UTF-8 encoded */
+  u8 enc;               /* Text encoding handled by xCmp() */
+  u8 type;              /* One of the SQLITE_COLL_... values below */
+  void *pUser;          /* First argument to xCmp() */
   int (*xCmp)(void*,int, const void*, int, const void*);
+  void (*xDel)(void*);  /* Destructor for pUser */
 };
 
 /*