vfprintf.c: use ssize_t for ssizearg

[Claus Assmann]

Should the type of ssizearg be ssize_t?

Index: vfprintf.c
===================================================================
RCS file: cvs/src/lib/libc/stdio/vfprintf.c,v
retrieving revision 1.58
diff -u -r1.58 vfprintf.c
--- vfprintf.c  9 Nov 2009 00:18:27 -0000       1.58
+++ vfprintf.c  17 Oct 2010 01:34:24 -0000
@@ -62,7 +62,7 @@
        unsigned long long      ulonglongarg;
        ptrdiff_t               ptrdiffarg;
        size_t                  sizearg;
-       size_t                  ssizearg;
+       ssize_t                 ssizearg;
        intmax_t                intmaxarg;
        uintmax_t               uintmaxarg;
        void                    *pvoidarg;