1999-10-22  Havoc Pennington  <hp@pobox.com>

* src/io-xpm.c (mem_buffer): Clean up stupid
increment-inside-array-dereference thing

* src/testpixbuf.c: Add XPM data tests.

* src/io-xpm.c: Make the XPM data buffer const, fix const
correctness throughout the code.