Avoid null pointer dereference in __dbc_cmp_pp()

gistfile1.diff

diff --git a/src/db/db_iface.c b/src/db/db_iface.c
index 59e0ba5..88ee548 100644
--- a/src/db/db_iface.c
+++ b/src/db/db_iface.c
@@ -2127,13 +2127,12 @@ __dbc_cmp_pp(dbc, other_cursor, result, flags)
 	int *result;
 	u_int32_t flags;
 {
-	DB *dbp, *odbp;
+	DB *dbp;
 	DB_THREAD_INFO *ip;
 	ENV *env;
 	int ret;
 
 	dbp = dbc->dbp;
-	odbp = other_cursor->dbp;
 	env = dbp->env;
 
 	if (flags != 0)
@@ -2145,7 +2144,7 @@ __dbc_cmp_pp(dbc, other_cursor, result, flags)
 		return (EINVAL);
 	}
 
-	if (dbp != odbp) {
+	if (dbp != other_cursor->dbp) {
 		__db_errx(env, DB_STR("0618",
 "DBcursor->cmp both cursors must refer to the same database."));
 		return (EINVAL);