Add pzErr parameters to the xConnect and xCreate methods of virtual tables

in order to provide better error reporting.  This is an interface change
for virtual tables.  Prior virtual table implementations will need to be
modified and recompiled. (CVS 3402)

FossilOrigin-Name: f44b8bae97b6872524580009c96d07391578c388

src/test_schema.c

@@ -13,7 +13,7 @@
 ** is not included in the SQLite library.  It is used for automated
 ** testing of the SQLite library.
 **
-** $Id: test_schema.c,v 1.9 2006/07/08 17:06:44 drh Exp $
+** $Id: test_schema.c,v 1.10 2006/09/10 17:32:00 drh Exp $
 */
 
 /* The code in this file defines a sqlite3 virtual-table module that
@@ -85,7 +85,8 @@ static int schemaCreate(
   sqlite3 *db,
   void *pAux,
   int argc, char **argv,
-  sqlite3_vtab **ppVtab
+  sqlite3_vtab **ppVtab,
+  char **pzErr
 ){
   int rc = SQLITE_NOMEM;
   schema_vtab *pVtab = MALLOC(sizeof(schema_vtab));