bugfix: PathPreference dialog retains state on rotation.

Pulled my hair out on this one, and it's still kind of a hack...
Unbelievably difficult to do the simplest of things sometimes.

src/paulscode/android/mupen64plusae/persistent/PathPreference.java

@@ -31,6 +31,7 @@
 import android.content.DialogInterface;
 import android.content.res.TypedArray;
 import android.os.Environment;
+import android.os.Parcelable;
 import android.preference.DialogPreference;
 import android.text.TextUtils;
 import android.util.AttributeSet;
@@ -166,6 +167,37 @@ else if( mDoReclick )
         }
     }
 
+    @Override
+    protected Parcelable onSaveInstanceState()
+    {
+        final SavedStringState myState = new SavedStringState( super.onSaveInstanceState() );
+        myState.mValue = mNewValue;
+        return myState;
+    }
+
+    @Override
+    protected void onRestoreInstanceState( Parcelable state )
+    {
+        if( state == null || !state.getClass().equals( SavedStringState.class ) )
+        {
+            // Didn't save state for us in onSaveInstanceState
+            super.onRestoreInstanceState( state );
+            return;
+        }
+
+        final SavedStringState myState = (SavedStringState) state;
+        super.onRestoreInstanceState( myState.getSuperState() );
+        populate( myState.mValue );
+
+        // If the dialog is already showing, we must close and reopen to refresh the contents
+        // TODO: Find a less hackish solution, if one exists
+        if( getDialog() != null )
+        {
+            mDoReclick = true;
+            getDialog().dismiss();
+        }
+    }
+
     private void populate( String path )
     {
         // Cache the path to persist on Ok