Fixed various type errors for 64 bit architectures and other warnings. (Most

are in harmless debug messages, but anyway..)

Rev: src/array.c:1.181
Rev: src/backend.cmod:1.175
Rev: src/builtin_functions.c:1.599
Rev: src/code/bytecode.h:1.11
Rev: src/encode.c:1.228
Rev: src/gc.c:1.270
Rev: src/interpret_functions.h:1.184
Rev: src/las.c:1.364
Rev: src/modules/Image/image.c:1.222
Rev: src/modules/Parser/html.c:1.177
Rev: src/modules/_Charset/iso2022.c:1.38
Rev: src/modules/files/file.c:1.351
Rev: src/modules/files/sendfile.c:1.72
Rev: src/modules/spider/xml.c:1.75
Rev: src/modules/system/memory.c:1.34
Rev: src/object.c:1.267
Rev: src/peep.c:1.106
Rev: src/pike_types.c:1.247
Rev: src/post_modules/Shuffler/a_source_system_memory.c:1.12
Rev: src/post_modules/Shuffler/b_source_normal_file.c:1.14
Rev: src/program.c:1.588
Rev: src/rbtree.c:1.25
Rev: src/threads.c:1.244