various tweaks.

include/fcall.h

@@ -1,7 +1,7 @@
 #ifndef _FCALL_H_
 #define _FCALL_H_ 1
-#if defined(__cplusplus)
-extern "C" { 
+#ifdef __cplusplus
+extern "C" {
 #endif
 /*
 #pragma	src	"/sys/src/libc/9sys"
@@ -9,7 +9,6 @@ extern "C" {
 */
 
 #define	VERSION9P	"9P2000"
-
 #define	MAXWELEM	16
 
 typedef
@@ -123,7 +122,8 @@ int	read9pmsg(int, void*, uint);
 #pragma	varargck	type	"M"	ulong
 #pragma	varargck	type	"D"	Dir*
 */
-#if defined(__cplusplus)
+
+#ifdef __cplusplus
 }
 #endif
 #endif

include/thread.h

@@ -88,6 +88,7 @@ int		send(Channel *c, void *v);
 int		sendp(Channel *c, void *v);
 int		sendul(Channel *c, unsigned long v);
 int		threadcreate(void (*f)(void *arg), void *arg, unsigned int stacksize);
+int		threadcreateidle(void (*f)(void*), void*, unsigned int);
 void**		threaddata(void);
 void		threadexits(char *);
 void		threadexitsall(char *);