FTGL.h not found

[John W. Eaton]

After applying the latest patches from the octave-graphics-mq archive,
I see this when configuring:

  configure: WARNING: FTGL library not found. Native renderer will not have 
on-screen text
  configure: WARNING: 
  configure: WARNING: I didn't find the necessary libraries to compile native
  configure: WARNING: graphics. It isn't necessary to have native graphics
  configure: WARNING: but you will have to use gnuplot or you won't be able
  configure: WARNING: to use any of Octave's plotting commands
  configure: WARNING: 
  configure:

  NOTE: libraries may be skipped if a library is not found OR
        if the library on your system is missing required features.

My system (Debian testing) has /usr/include/FTGL/ftgl.h, not FTGL.h.

jwe