The previous change to Texture's DevIL error checking from a few commits ago was a bit naive.  It should have cleared all pending IL errors before throwing.  It now does this.
The previous change to Texture's DevIL error checking from a few commits ago was
a bit naive.  It should have cleared all pending IL errors before throwing.  It
now does this.


tzlaine/GG,tzlaine/GG,tzlaine/GG,tzlaine/GG