MFB: fix #36727 (segfault in pdo_pgsql bindValue() when no parameters are defined)

ext/pdo_pgsql/pgsql_statement.c

@@ -174,7 +174,7 @@ static int pgsql_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_data *
 					} else {
 						/* resolve parameter name to rewritten name */
 						char *nameptr;
-						if (SUCCESS == zend_hash_find(stmt->bound_param_map,
+						if (stmt->bound_param_map && SUCCESS == zend_hash_find(stmt->bound_param_map,
 								param->name, param->namelen + 1, (void**)&nameptr)) {
 							param->paramno = atoi(nameptr + 1) - 1;
 						} else {

ext/pdo_pgsql/tests/bug36727.phpt

@@ -0,0 +1,23 @@
+--TEST--
+Bug #36727 (segfault in bindValue() when no parameters are defined)
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo') || !extension_loaded('pdo_pgsql')) die('skip not loaded');
+require dirname(__FILE__) . '/../../../ext/pdo/tests/pdo_test.inc';
+require dirname(__FILE__) . '/config.inc';
+PDOTest::skip();
+?>
+--FILE--
+<?php
+require dirname(__FILE__) . '/../../../ext/pdo/tests/pdo_test.inc';
+require dirname(__FILE__) . '/config.inc';
+$db = PDOTest::test_factory(dirname(__FILE__) . '/common.phpt');
+
+$stmt = $db->prepare('SELECT * FROM child');
+var_dump($stmt->bindValue(':test', 1, PDO::PARAM_INT));
+
+echo "Done\n";
+?>
+--EXPECT--
+bool(false)
+Done