Solved some type conversion warnings; replaced #warning with // TODO

ZLib/gzlib.c

@@ -253,7 +253,7 @@ local gzFile gz_open(path, fd, mode)
 
     /* save the current position for rewinding (only if reading) */
     if (state->mode == GZ_READ) {
-        state->start = LSEEK(state->fd, 0, SEEK_CUR);
+        state->start = (z_off64_t) LSEEK(state->fd, 0, SEEK_CUR);
         if (state->start == -1) state->start = 0;
     }
 
@@ -393,7 +393,7 @@ z_off64_t ZEXPORT gzseek64(file, offset, whence)
     /* if within raw area while reading, just go there */
     if (state->mode == GZ_READ && state->how == COPY &&
             state->x.pos + offset >= 0) {
-        ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
+        ret = (z_off64_t) LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
         if (ret == -1)
             return -1;
         state->x.have = 0;
@@ -489,7 +489,7 @@ z_off64_t ZEXPORT gzoffset64(file)
         return -1;
 
     /* compute and return effective offset in file */
-    offset = LSEEK(state->fd, 0, SEEK_CUR);
+    offset = (z_off64_t) LSEEK(state->fd, 0, SEEK_CUR);
     if (offset == -1)
         return -1;
     if (state->mode == GZ_READ)             /* reading */

ZLib/gzread.c

@@ -27,7 +27,7 @@ local int gz_load(state, buf, len, have)
 
     *have = 0;
     do {
-        ret = read(state->fd, buf + *have, len - *have);
+        ret = (int) read(state->fd, buf + *have, len - *have);
         if (ret <= 0)
             break;
         *have += ret;

ZLib/gzwrite.c

@@ -81,7 +81,7 @@ local int gz_comp(state, flush)
 
     /* write directly if requested */
     if (state->direct) {
-        got = write(state->fd, strm->next_in, strm->avail_in);
+        got = (int) write(state->fd, strm->next_in, strm->avail_in);
         if (got < 0 || (unsigned)got != strm->avail_in) {
             gz_error(state, Z_ERRNO, zstrerror());
             return -1;
@@ -98,7 +98,7 @@ local int gz_comp(state, flush)
         if (strm->avail_out == 0 || (flush != Z_NO_FLUSH &&
             (flush != Z_FINISH || ret == Z_STREAM_END))) {
             have = (unsigned)(strm->next_out - state->x.next);
-            if (have && ((got = write(state->fd, state->x.next, have)) < 0 ||
+            if (have && ((got = (int) write(state->fd, state->x.next, have)) < 0 ||
                          (unsigned)got != have)) {
                 gz_error(state, Z_ERRNO, zstrerror());
                 return -1;