insists on defining SIGCHLD, even if it already has a definition.
(file_p): Use the constant 4 instead of R_OK; empirically, the
number is more portable than the symbol if you count the #include
hair you have to go through to get R_OK defined. Ffile_readable_p
does this too.
* xrdb.c (getuid): Declare this to return short.
wish I knew why.
Don't include <sys/types.h>; just declare getuid to return an
int. Big deal.
(MAXPATHLEN): If this is not defined by the system's include
files, give it a value of 256.
(get_user_db): Fetch the defaults directly from the display
structure, rather than using XResourceManagerString; that
function doesn't exist in the older versions of X.
