* bsd-kvm.c (bsd_kvm_open): Properly cast sentinel in concat call.

* bsd-kvm.c (bsd_kvm_open): Properly cast sentinel in concat call.
* coffread.c (patch_type, process_coff_symbol): Likewise.
* corelow.c (core_open): Likewise.
* dwarf2read.c (dwarf_decode_lines, dwarf2_start_subfile):
* language.c (set_lang_str, set_type_str, set_range_str)
(set_case_str): Likewise.
* source.c (add_path, openp): Likewise.
* stabsread.c: Likewise.
* top.c (init_history): Likewise.
* utils.c (xfullpath): Likewise.
* value.c (lookup_internalvar): Likewise.
* cli/cli-cmds.c (cd_command): Likewise.
* cli/cli-dump.c (add_dump_command): Likewise.