Restore legacy runtime compatibility

@@ -50,6 +50,9 @@ typedef enum _ASIURLReplacementMode {
 	// If the response is an HTML or CSS file, this will be set so the content can be correctly parsed when it has finished fetching external resources
 	ASIWebContentType webContentType;
 
+	// Used internally for parsing HTML (with libxml)
+	struct _xmlDoc *doc;
+
 	// Stores a reference to the ASIWebPageRequest that created this request
 	// Note that a parentRequest can also have a parent request because ASIWebPageRequests parse their contents to look for external resources recursively
 	// For example, a request for an image can be created by a request for a stylesheet which was created by a request for a web page

@@ -37,14 +37,11 @@ static NSMutableArray *requestsUsingXMLParser = nil;
 
 @property (retain, nonatomic) ASINetworkQueue *externalResourceQueue;
 @property (retain, nonatomic) NSMutableDictionary *resourceList;
-@property (assign, nonatomic) xmlDocPtr doc; // Declared as @property in order to get a "free" ivar and hide it from the header
 
 @end
 
 @implementation ASIWebPageRequest
 
-@synthesize doc;
-
 + (void)initialize
 {
 	if (self == [ASIWebPageRequest class]) {