xyz-modem: va_start() must be matched by va_end()

Every va_start() call must be matched by a va_end() call.

scripts/checkpatch.pl required reformatting the complete function
zm_dprintf().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

common/xyzModem.c

@@ -187,6 +187,7 @@ zm_dprintf (char *fmt, ...)
 
 	va_start(args, fmt);
 	len = diag_vsprintf(zm_out, fmt, args);
+	va_end(args);
 	zm_out += len;
 	return len;
 }