* app/composite/gimp-composite-{mmx,sse,sse2,altivec,vis}.c: Regenerated.

* app/composite/gimp-composite-regression.[ch]: Ensure all ints
  are now unsigned longs.

* app/composite/gimp-composite-sse2.c (gimp_composite_addition_rgba8_rgba8_rgba8_sse2):
  Enclosed the troublesome (rather dense) asm construct in
  __OPTIMIZE__ in which case the compiler can successfully
  allocate enough registers to load up the asm()