* posix/regexec.c (check_node_accept_bytes): Correct cast to avoid
warning.
* posix/regex_internal.c (re_string_reconstruct): Add cast to
avoid warning.
(build_wcs_upper_buffer): Change type of bug to plain char.
* locale/weightwc.h (findidx): Add casts to avoid warnings.
* time/mktime.c (ranged_convert): Initialize tm to make the
compiler happy.
* wcsmbs/mbsrtowcs_l.c (__mbsrtowcs_l): Add casts to avoid warnings.
* wcsmbs/wcsnrtombs.c (__wcsnrtombs): Add casts to avoid warnings.
* wcsmbs/mbsnrtowcs.c: Add casts to avoid warnings.
* wcsmbs/wcsrtombs.c (__wcsrtombs): Add casts to avoid warnings.
* wcsmbs/wcrtomb.c (__wcrtomb): Add casts to avoid warnings.
* wcsmbs/mbrtowc.c (__mbrtowc): Use unsigned char for outbuf.
* posix/regex_internal.c [_LIBC] (build_wcs_buffer): Avoid using
dynamically sized array.
(build_wcs_upper_buffer): Likewise.