#105 Rectangle textures do not appear in the Texture pane

[Bruce Merry]

This is being caused by GL_TEXTURE53 aliasing GL_TEXTURE_RECTANGLE, preventing gldb_state_find_child_enum from returning the right thing. This particular case can be disambiguated by checking the numeric name as well, but there will need to be an audit for other conflicts.

This may also require some disambiguation in the trace code to select the correct version in each case.