Fix ctype(3) usage on NetBSD

We need to cast value passed to isspace(3) to unsigned char to explicitly
prevent possibly undefined behavior.

/tmp/pkgsrc-tmp/wip/cmark/work/cmark-0.24.1/src/commonmark.c: In function 'S_render_node':
/tmp/pkgsrc-tmp/wip/cmark/work/cmark-0.24.1/src/commonmark.c:273:9: warning: array subscript has type 'char' [-Wchar-subscripts]
         (code_len > 2 && !isspace(code[0]) &&
         ^
/tmp/pkgsrc-tmp/wip/cmark/work/cmark-0.24.1/src/commonmark.c:274:10: warning: array subscript has type 'char' [-Wchar-subscripts]
          !(isspace(code[code_len - 1]) && isspace(code[code_len - 2]))) &&
          ^
/tmp/pkgsrc-tmp/wip/cmark/work/cmark-0.24.1/src/commonmark.c:274:10: warning: array subscript has type 'char' [-Wchar-subscripts]

CTYPE(3)                   Library Functions Manual                   CTYPE(3)

NAME
     isalpha, isupper, islower, isdigit, isxdigit, isalnum, isspace, ispunct,
     isprint, isgraph, iscntrl, isblank, toupper, tolower, - character
     classification and mapping functions

LIBRARY
     Standard C Library (libc, -lc)

CAVEATS
     The first argument of these functions is of type int, but only a very
     restricted subset of values are actually valid.  The argument must either
     be the value of the macro EOF (which has a negative value), or must be a
     non-negative value within the range representable as unsigned char.
     Passing invalid values leads to undefined behavior.
NetBSD 7.99                    February 25, 2015                   NetBSD 7.99

0 files changed, 0 insertions, 0 deletions