Fix iOS build target

RSXML/RSHTMLMetadata.h

@@ -23,6 +23,7 @@
 //  SOFTWARE.
 
 @import Foundation;
+@import CoreGraphics;
 
 typedef enum {
 	RSFeedTypeNone,

RSXML/RSOPMLItem.h

@@ -48,5 +48,7 @@ extern NSString *OPMLXMLURLKey; //xmlUrl
 - (id)attributeForKey:(NSString *)key;
 
 - (NSString *)recursiveDescription;
+#ifdef TARGET_MAC
 - (NSXMLDocument *)exportXML;
+#endif
 @end

RSXML/RSOPMLItem.m

@@ -135,6 +135,8 @@ NSString *OPMLXMLURLKey = @"xmlUrl";
 	return mStr;
 }
 
+#ifdef TARGET_MAC
+
 /// Can be used to export directly to @c .opml file.
 - (NSXMLDocument *)exportXML {
 	NSXMLElement *head = [NSXMLElement elementWithName:@"head"];
@@ -172,4 +174,6 @@ NSString *OPMLXMLURLKey = @"xmlUrl";
 	}
 }
 
+#endif
+
 @end