problem in TextureObjectSet::flushDeletedTextureObjects

[hankern]

in osg/Texture.cpp
void TextureObjectSet::flushDeletedTextureObjects(double /*currentTime*/, double& availableTime) { for(; itr != _orphanedTextureObjects.end() && timer.elapsedTime()<availableTime && numDeleted<maxNumObjectsToDelete; ++itr) {} }
why it needs condition timer.elapsedTime()<availableTime. the condition almost will be false and it leads to texture object will not be deleted.