Resolve "comparison of signed and unsigned values" compiler warnings.

* allchblk.c (GC_allochblk_nth): Cast MAX_BLACK_LIST_ALLOC and
HBLKSIZE to signed_word.
* mallocx.c (GC_generic_malloc_many): Cast my_bytes_allocd to word.
* mark.c (GC_do_local_mark): Cast the result of local_top minus
local_mark_stack to word (since is non-negative).
* misc.c (GC_base): Declare sz as unsigned word.
* misc.c (GC_enable_incremental): Cast bytes_written to size_t in
comparison to len.
* obj_map.c (GC_initialize_offsets): Declare 'i' as unsigned.
* os_dep.c (GC_or_pages): Ditto.
* typd_mlc.c (GC_init_explicit_typing): Ditto.
* ptr_chck.c (GC_is_visible): Cast the result of p minus base to word.
* typd_mlc.c (GC_make_descriptor): Cast last_set_bit to word (since
non-negative) when compared to BITMAP_BITS.

1 files changed, 1 insertions, 1 deletions

diff --git a/mallocx.c b/mallocx.c
index d92014c9..e5928358 100644
--- a/mallocx.c
+++ b/mallocx.c
@@ -377,7 +377,7 @@ GC_API void GC_CALL GC_generic_malloc_many(size_t lb, int k, void **result)
         my_bytes_allocd = 0;
         for (p = op; p != 0; p = obj_link(p)) {
           my_bytes_allocd += lb;
-          if (my_bytes_allocd >= HBLKSIZE) {
+          if ((word)my_bytes_allocd >= HBLKSIZE) {
             *opp = obj_link(p);
             obj_link(p) = 0;
             break;