ITS#2924, fix transition to subsequent subordinates

servers/slapd/backglue.c

@@ -441,7 +441,8 @@ glue_tool_entry_first (
 		}
 
 	}
-	if (!glueBack || glueBack->be_entry_open (glueBack, glueMode) != 0)
+	if (!glueBack || !glueBack->be_entry_open || !glueBack->be_entry_first ||
+		glueBack->be_entry_open (glueBack, glueMode) != 0)
 		return NOID;
 
 	return glueBack->be_entry_first (glueBack);
@@ -462,7 +463,7 @@ glue_tool_entry_next (
 	rc = glueBack->be_entry_next (glueBack);
 
 	/* If we ran out of entries in one database, move on to the next */
-	if (rc == NOID) {
+	while (rc == NOID) {
 		glueBack->be_entry_close (glueBack);
 		for (i=0; i<gi->nodes; i++) {
 			if (gi->n[i].be == glueBack)
@@ -470,7 +471,7 @@ glue_tool_entry_next (
 		}
 		if (i == 0) {
 			glueBack = NULL;
-			rc = NOID;
+			break;
 		} else {
 			glueBack = gi->n[i-1].be;
 			rc = glue_tool_entry_first (b0);