All of these are effectively the same. No point in duplicating it
everywhere.
Remove prefix from has_function. Apparently having the prefix in there
changes behavior.
Also fix an error on MinGW where SSIZE_T_MAX is undefined.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
The latter is the proper macro defined by Windows headers.
Fixes compilation under at least clang-cl which mandates function
declarations.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Fixes the following warning:
json_pointer.c:230:7: warning: implicit declaration of function
'vasprintf' is invalid in C99 [-Wimplicit-function-declaration]
rc = vasprintf(&path_copy, path_fmt, args);
Rosen Penev