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/obj_map.c b/obj_map.c
index 082a0aa7..ed75ef12 100644
--- a/obj_map.c
+++ b/obj_map.c
@@ -78,7 +78,7 @@ GC_INNER void GC_register_displacement_inner(size_t offset)
 
 GC_INNER void GC_initialize_offsets(void)
 {
-  int i;
+  unsigned i;
   if (GC_all_interior_pointers) {
     for (i = 0; i < VALID_OFFSET_SZ; ++i)
       GC_valid_offsets[i] = TRUE;