bugfix... tror jag.

Rev: src/modules/image/Makefile.src:1.6
Rev: src/modules/image/blit.c:1.3
Rev: src/modules/image/image.c:1.22
Rev: src/modules/image/image.h:1.8
Rev: src/modules/image/togif.c:1.10
Rev: src/pike_types.c:1.6