Fix php_openssl_certificate_ce declaration

Author: nikic

ext/openssl/openssl.c

@@ -130,6 +130,8 @@ enum php_openssl_encoding {
 
 /* OpenSSLCertificate class */
 
+zend_class_entry *php_openssl_certificate_ce;
+
 static zend_object_handlers php_openssl_certificate_object_handlers;
 
 static zend_object *php_openssl_certificate_create_object(zend_class_entry *class_type) {

ext/openssl/php_openssl.h

@@ -118,7 +118,7 @@ typedef struct _php_openssl_certificate_object {
 	zend_object std;
 } php_openssl_certificate_object;
 
-zend_class_entry *php_openssl_certificate_ce;
+extern zend_class_entry *php_openssl_certificate_ce;
 
 static inline php_openssl_certificate_object *php_openssl_certificate_from_obj(zend_object *obj) {
 	return (php_openssl_certificate_object *)((char *)(obj) - XtOffsetOf(php_openssl_certificate_object, std));