fixup! Migrate SOAP SDL resource to object

UPGRADING

@@ -140,7 +140,8 @@ PHP 8.4 UPGRADE NOTES
     Checks using is_resource() (i.e. is_resource($soapClient->httpurl)) should
     be replaced with checks for null (i.e. $soapClient->httpurl !== null).
   . SoapClient::$sdl is now a Soap\Sdl object rather than a resource.
-    Value checks using is_resource() should be replaced with checks for `null`.
+    Checks using is_resource() (i.e. is_resource($soapClient->sdl)) should be
+    replaced with checks for null (i.e. $soapClient->sdl !== null).
 
 - SPL:
   . Out of bounds accesses in SplFixedArray now throw an exception of type

ext/soap/php_soap.h

@@ -265,7 +265,7 @@ static inline soap_url_object *soap_url_object_fetch(zend_object *obj)
 
 #define Z_SOAP_URL_P(zv) soap_url_object_fetch(Z_OBJ_P(zv))
 
-typedef struct {
+typedef struct soap_sdl_object {
 	sdl *sdl;
 	zend_object std;
 } soap_sdl_object;