fix issue 184. clean up xcode project.
diff --git a/tinyxml2.h b/tinyxml2.h
index 4dfb015..5f8bfcd 100755
--- a/tinyxml2.h
+++ b/tinyxml2.h
@@ -122,9 +122,9 @@
 /* Versioning, past 1.0.14:

 	http://semver.org/

 */

-static const int TIXML2_MAJOR_VERSION = 2;
-static const int TIXML2_MINOR_VERSION = 2;
-static const int TIXML2_PATCH_VERSION = 0;
+static const int TIXML2_MAJOR_VERSION = 2;

+static const int TIXML2_MINOR_VERSION = 2;

+static const int TIXML2_PATCH_VERSION = 0;

 

 namespace tinyxml2

 {

@@ -261,7 +261,7 @@
         return _mem[i];

     }

 

-    const T& PeekTop() const                            {

+    const T& PeekTop() const            {

         TIXMLASSERT( _size > 0 );

         return _mem[ _size - 1];

     }

@@ -317,6 +317,7 @@
     virtual void* Alloc() = 0;

     virtual void Free( void* ) = 0;

     virtual void SetTracked() = 0;

+    virtual void Clear() = 0;

 };

 

 

@@ -329,10 +330,20 @@
 public:

     MemPoolT() : _root(0), _currentAllocs(0), _nAllocs(0), _maxAllocs(0), _nUntracked(0)	{}

     ~MemPoolT() {

+        Clear();

+    }

+    

+    void Clear() {

         // Delete the blocks.

-        for( int i=0; i<_blockPtrs.Size(); ++i ) {

-            delete _blockPtrs[i];

+        while( !_blockPtrs.Empty()) {

+            Block* b  = _blockPtrs.Pop();

+            delete b;

         }

+        _root = 0;

+        _currentAllocs = 0;

+        _nAllocs = 0;

+        _maxAllocs = 0;

+        _nUntracked = 0;

     }

 

     virtual int ItemSize() const	{

@@ -365,6 +376,7 @@
         _nUntracked++;

         return result;

     }

+    

     virtual void Free( void* mem ) {

         if ( !mem ) {

             return;