Don't accept null in pg_unescape_bytea()

This is an error that slipped in via 8d37c37.
pg_unescape_bytea() did not accept null in PHP 7.4, and it is not
meaningful for it to accept null now -- it will always fail, and now
with a misleading OOM message.

Author: nikic

ext/pgsql/pgsql.c

@@ -3359,8 +3359,7 @@ PHP_FUNCTION(pg_unescape_bytea)
 	char *from, *tmp;
 	size_t to_len;
 	size_t from_len;
-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "s!",
-							  &from, &from_len) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &from, &from_len) == FAILURE) {
 		RETURN_THROWS();
 	}
 

ext/pgsql/pgsql.stub.php

@@ -425,7 +425,7 @@ function pg_escape_string($connection, string $string = UNKNOWN): string {}
 /** @param resource|string $connection */
 function pg_escape_bytea($connection, string $string = UNKNOWN): string {}
 
-function pg_unescape_bytea(?string $string = null): string {}
+function pg_unescape_bytea(string $string): string {}
 
 /** @param resource|string $connection */
 function pg_escape_literal($connection, string $string = UNKNOWN): string|false {}

ext/pgsql/pgsql_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 3479aee134cb8d952c846d120f51a8cf75e55e86 */
+ * Stub hash: deb01afb2b4e645c00684fae61a6042ebfbaaaa1 */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_pg_connect, 0, 0, 1)
 	ZEND_ARG_TYPE_INFO(0, connection_string, IS_STRING, 0)
@@ -327,8 +327,8 @@ ZEND_END_ARG_INFO()
 
 #define arginfo_pg_escape_bytea arginfo_pg_escape_string
 
-ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_pg_unescape_bytea, 0, 0, IS_STRING, 0)
-	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, string, IS_STRING, 1, "null")
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_pg_unescape_bytea, 0, 1, IS_STRING, 0)
+	ZEND_ARG_TYPE_INFO(0, string, IS_STRING, 0)
 ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_pg_escape_literal, 0, 1, MAY_BE_STRING|MAY_BE_FALSE)