3c4734d69a
Texture names must now be escaped in formspec elements image[], background[], image_button[], image_button_exit[]. Instead of special-case handling of texture loading (and unloading which was missing) in guiFormSpecMenu.cpp, use the newly created ISimpleTextureSource interface which is a minimal subset of ITextureSource. There is an implementation of this interface used by GUIEngine (MenuTextureSource). Fix an off-by-one bug in unescape_string; it caused requests for a texture called "\0".