Mattias fixed brown bag crash in RLE clipping code
it was the general clipping code, nothing RLE-specific
(sorry about this)
Optimizations can be enabled with configure --disable-debug
It seems that -fexpensive-optimizations is included in -O2 by default
so it should not be necessary to add explicitly. -fomit-frame-pointer is
sensible though. We need a standard benchmark suite to determine whether
the rest (-funroll-loops, -finline-functions) are worth it, though I have
the feeling it isnβt right now