socket_create_pair() can no longer return NULL

Closes GH-6592.

Author: cmb69

ext/sockets/sockets.stub.php

@@ -78,7 +78,7 @@ function socket_setopt(Socket $socket, int $level, int $option, $value): bool {}
 
 #ifdef HAVE_SOCKETPAIR
 /** @param array $pair */
-function socket_create_pair(int $domain, int $type, int $protocol, &$pair): ?bool {}
+function socket_create_pair(int $domain, int $type, int $protocol, &$pair): bool {}
 #endif
 
 #ifdef HAVE_SHUTDOWN

ext/sockets/sockets_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: ee025740240c285691a84cfa3563c1dd1586a75d */
+ * Stub hash: 90c3c470833947859433a2668d328fddfff94ae9 */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_socket_select, 0, 4, MAY_BE_LONG|MAY_BE_FALSE)
 	ZEND_ARG_TYPE_INFO(1, read, IS_ARRAY, 1)
@@ -125,7 +125,7 @@ ZEND_END_ARG_INFO()
 #define arginfo_socket_setopt arginfo_socket_set_option
 
 #if defined(HAVE_SOCKETPAIR)
-ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_socket_create_pair, 0, 4, _IS_BOOL, 1)
+ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_socket_create_pair, 0, 4, _IS_BOOL, 0)
 	ZEND_ARG_TYPE_INFO(0, domain, IS_LONG, 0)
 	ZEND_ARG_TYPE_INFO(0, type, IS_LONG, 0)
 	ZEND_ARG_TYPE_INFO(0, protocol, IS_LONG, 0)