Silence miscellaneous 64-to-32-bit data loss warnings.

This resolves #341.

src/arena.c

@@ -301,7 +301,7 @@ JEMALLOC_INLINE_C void *
 arena_run_reg_alloc(arena_run_t *run, arena_bin_info_t *bin_info)
 {
 	void *ret;
-	unsigned regind;
+	size_t regind;
 	arena_chunk_map_misc_t *miscelm;
 	void *rpages;
 
@@ -325,7 +325,7 @@ arena_run_reg_dalloc(arena_run_t *run, void *ptr)
 	size_t mapbits = arena_mapbits_get(chunk, pageind);
 	szind_t binind = arena_ptr_small_binind_get(ptr, mapbits);
 	arena_bin_info_t *bin_info = &arena_bin_info[binind];
-	unsigned regind = arena_run_regind(run, bin_info, ptr);
+	size_t regind = arena_run_regind(run, bin_info, ptr);
 
 	assert(run->nfree < bin_info->nregs);
 	/* Freeing an interior pointer can cause assertion failure. */

src/prof.c

@@ -109,7 +109,7 @@ static char		prof_dump_buf[
     1
 #endif
 ];
-static unsigned		prof_dump_buf_end;
+static size_t		prof_dump_buf_end;
 static int		prof_dump_fd;
 
 /* Do not dump any profiles until bootstrapping is complete. */

src/util.c

@@ -60,7 +60,7 @@ wrtmessage(void *cbopaque, const char *s)
 	 */
 	UNUSED long result = syscall(SYS_write, STDERR_FILENO, s, strlen(s));
 #else
-	UNUSED int result = write(STDERR_FILENO, s, strlen(s));
+	UNUSED ssize_t result = write(STDERR_FILENO, s, strlen(s));
 #endif
 }
 
@@ -90,7 +90,7 @@ buferror(int err, char *buf, size_t buflen)
 
 #ifdef _WIN32
 	FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, 0,
-	    (LPSTR)buf, buflen, NULL);
+	    (LPSTR)buf, (DWORD)buflen, NULL);
 	return (0);
 #elif defined(__GLIBC__) && defined(_GNU_SOURCE)
 	char *b = strerror_r(err, buf, buflen);