regcomp, regexec, fnmatch: avoid array bounds read error * lib/regcomp.c (build_equiv_class): From glibc: Use only the low 24 bits of a findidx return value as an index into the weights array. Patch by Ulrich Drepper: http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commit;h=b7d1c5fa30 * lib/regexec.c (check_node_accept_bytes): Likewise. * lib/fnmatch_loop.c (FCT): Likewise.