add addconf arg checking; fix bug found by argument checking.

Reference: /n/sources/patch/applied/9loadaddconf
Date: Sun Jan 20 20:24:36 CET 2008
Signed-off-by: quanstro@quanstro.net

--- /sys/src/boot/pc/lib.h	Sun Jan 20 20:23:35 2008
+++ /sys/src/boot/pc/lib.h	Sun Jan 20 20:23:34 2008
@@ -53,6 +53,7 @@
 extern 	int	snprint(char*, int, char*, ...);
 extern	int	fmtinstall(int, int (*)(Fmt*));
 
+#pragma varargck	argpos	addconf 1
 #pragma	varargck	argpos	fmtprint	2
 #pragma	varargck	argpos	print		1
 #pragma	varargck	argpos	seprint		3
--- /sys/src/boot/pc/devsd.c	Sun Jan 20 20:23:42 2008
+++ /sys/src/boot/pc/devsd.c	Sun Jan 20 20:23:40 2008
@@ -462,7 +462,7 @@
 
 	addconf("%spart=", unit->name);
 	for(i=1, pp=&unit->part[i]; i<unit->npart; i++, pp++)	/* skip 0, which is "data" */
-		addconf("%s%s %ld %ld", i==1 ? "" : "/", pp->name,
+		addconf("%s%s %lld %lld", i==1 ? "" : "/", pp->name,
 			pp->start, pp->end);
 	addconf("\n");
 }