treat 'h' as a fprint flag.  thus drawing no complaint from ?c
for the following:
	char c = -127;
	print("%hhd\n", c);

Reference: /n/sources/patch/applied/printhflag
Date: Sat Dec 23 03:04:19 CET 2006
Signed-off-by: quanstro@quanstro.net

--- /sys/include/libc.h	Sat Dec 23 03:02:11 2006
+++ /sys/include/libc.h	Sat Dec 23 03:02:04 2006
@@ -204,6 +204,7 @@
 #pragma	varargck	type	"p"	uintptr
 #pragma	varargck	type	"p"	void*
 #pragma	varargck	flag	','
+#pragma	varargck	flag	'h'
 #pragma varargck	type	"<"	void*
 #pragma varargck	type	"["	void*
 #pragma varargck	type	"H"	void*