Fix typo in comment of signalObjectAndWait_func (Win32)

* win32_threads.c (signalObjectAndWait_func): Fix a typo in comment.
Fix missing tabs in SMakefile.amiga
(Apply commit 065a811 from 'master' branch.)

* SMakefile.amiga (clean, test, gctest, setjmp_t, gc*.lib, setjmp_t):
Fix indentation (replace spaces with tabs).

Conflicts:

    SMakefile.amiga
Fix typos in comments
(Apply commit af45302 from 'master' branch.)

* blacklst.c: Fix typo ("even though").
* cord/cordbscs.c: Fix typo ("exponentially").
* cord/cordxtra.c: Fix typo ("represented").
* dyn_load.c: Fix typos ("uncollectible", "occurred").
* extra/AmigaOS: Fix typos ("specific", "necessary", "always",
"effectiveness").
* finalize.c: Fix typo ("descendants").
* include/cord.h: Fix typo ("idiosyncrasies").
* include/gc.h: Fix typo ("collectible").
* include/gc_allocator.h: Fix typos ("allocator", "[un]collectible").
* mach_dep.c: Fix typo ("erroneously").
* malloc.c: Fix typos ("[un]collectible", "pointer-free",
"initialization").
* mallocx.c: Fix typos ("largely", "pointer-free", "uncollectible").
* mark.c: Fix typos ("[un]collectible", "even though").
* misc.c: Fix typo ("erroneously").
* os_dep.c: Fix typos ("non-addressable", "happening", "pointer-free").
* tests/test.c: Fix typos ("uncollectible", "reversed").
* tests/test_cpp.cc: Fix typos ("[un]collectible").
* typd_mlc.c: Fix typo ("copyright").
* win32_threads.c: Fix typos ("optimization", "uncollectible").

Conflicts:

    cord/cordxtra.c
    extra/AmigaOS.c
    malloc.c
    tests/test_cpp.cc
Fix more typos in comments and documentation
(Apply commit 6da20ac from 'master' branch.)

* alloc.c: Fix typo ("overflow").
* configure.ac: Fix typo ("optimization").
* doc/README.amiga: Fix typos ("also", "specific", "unnecessary").
* doc/README.cords: Fix typos ("descendants", "highlighted").
* doc/README.changes: Fix typos ("[un]collectible").
* README.md: Likewise.
* dbg_mlc.c: Likewise.
* doc/README.hp: Likewise.
* doc/README.linux: Likewise.
* doc/gcdescr.html: Likewise.
* doc/gcinterface.html: Likewise.
* include/gc_mark.h: Likewise.
* include/gc_pthread_redirects.h: Likewise.
* include/new_gc_alloc.h: Likewise.
* include/private/dbg_mlc.h: Likewise.
* include/private/gc_pmark.h: Likewise.
* include/private/gc_priv.h: Likewise.
* new_hblk.c: Likewise.
* doc/README.changes: Fix typo ("multi-threaded").
* cord/cordxtra.c: Likewise.
* doc/debugging.html: Likewise.
* doc/gcinterface.html: Likewise.
* doc/leak.html: Likewise.
* doc/overview.html: Likewise.
* doc/simple_example.html: Likewise.
* include/gc_mark.h: Likewise.
* include/private/gc_priv.h: Likewise.
* os_dep.c: Likewise.
* ptr_chck.c: Likewise.
* README.md: Fix typo ("pointer-free").
* allchblk.c: Likewise.
* doc/debugging.html: Likewise.
* doc/gcdescr.html: Likewise.

Conflicts:

    ChangeLog
    doc/README
    doc/README.amiga
    doc/gcdescr.html
    doc/gcinterface.html
    include/gc_mark.h
Fix GC_PTHREAD_PTRVAL definition for GC_PTHREADS_PARAMARK (Win32)

* win32_threads.c (GC_PTHREAD_PTRVAL): Define also if
GC_PTHREADS_PARAMARK (even w/o GC_WIN32_PTHREADS).
Fix typo in comment of GC_mark_from

* mark.c (GC_mark_from): Fix typo (capitalization) in comment ("ASAP").
Fix assertion violation in GC_mark_from prefetch loop

* mark.c (GC_mark_from): If "descr" is less than size of word then
skip prefetching and PUSH_CONTENTS of the current entry (thus,
eliminate assertion violation in the prefetch loop) if SMALL_CONFIG is
not defined.
Fix stackbottom/stack_end assignment in GC_call_with_gc_active

* misc.c (GC_call_with_gc_active): Add GC_noop1 call between "fn" call
and "return" statement to discourage the compiler from treating the
function call as a tail one (thus ensuring "stackbottom" COOLER_THAN
any stack pointer value obtained inside "fn").
* pthread_support.c (GC_call_with_gc_active): Likewise.
* win32_threads.c (GC_call_with_gc_active): Likewise.
Fix 'stack section' pointer passed to push_all_stack_sections (Pthreads)

* pthread_stop_world.c (GC_push_all_stacks): Use
traced_stack_sect->prev instead of traced_stack_sect if saved_stack_ptr
(of traced_stack_sect) is the same as stop_info.stack_ptr of the
examined thread (thus preventing assertion violation in
GC_push_all_stack_sections invoked during incremental collection).
Update (regenerate) configure files; update ChangeLog