Fixed cross-compiling with theos

JGE/src/JFileSystem.cpp

@@ -38,6 +38,12 @@ The content that users should not be touching.
 #include <QDir>
 #endif
 
+/*
+#ifdef IOS
+#include <Foundation/Foundation.h>
+#endif
+*/
+
 JFileSystem* JFileSystem::mInstance = NULL;
 
 JZipCache::JZipCache()
@@ -248,7 +254,7 @@ void JFileSystem::clearZipCache()
 
 bool JFileSystem::AttachZipFile(const string &zipfile, char *password /* = NULL */)
 {
-    if (mZipAvailable && mZipFile != NULL)
+    if (mZipAvailable && mZipFile.is_open())
     {
         if (mZipFileName != zipfile)
             DetachZipFile();		// close the previous zip file