common/status: add status_tracev() for making status wrappers.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

common/status.c

@@ -75,16 +75,13 @@ static void status_send_with_hdr(u16 type, const void *p, size_t len)
 	}
 }
 
-void status_trace(const char *fmt, ...)
+void status_tracev(const char *fmt, va_list ap)
 {
-	va_list ap;
 	char *str;
 
-	va_start(ap, fmt);
 	str = tal_vfmt(NULL, fmt, ap);
 	status_send_with_hdr(STATUS_TRACE, str, strlen(str));
 	tal_free(str);
-	va_end(ap);
 
 	/* Free up any temporary children. */
 	if (tal_first(trc)) {
@@ -93,6 +90,15 @@ void status_trace(const char *fmt, ...)
 	}
 }
 
+void status_trace(const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	status_tracev(fmt, ap);
+	va_end(ap);
+}
+
 void status_failed(enum status_fail code, const char *fmt, ...)
 {
 	va_list ap;

common/status.h

@@ -3,6 +3,7 @@
 #include "config.h"
 #include <ccan/compiler/compiler.h>
 #include <ccan/short_types/short_types.h>
+#include <stdarg.h>
 #include <stdlib.h>
 
 struct daemon_conn;
@@ -50,6 +51,8 @@ enum status_fail {
 void status_send_sync(const u8 *msg);
 /* Send a printf-style debugging trace. */
 void status_trace(const char *fmt, ...) PRINTF_FMT(1,2);
+/* vprintf-style */
+void status_tracev(const char *fmt, va_list ap);
 /* Send a failure status code with printf-style msg, and exit. */
 void status_failed(enum status_fail, const char *fmt, ...) PRINTF_FMT(2,3) NORETURN;