Don't send a bogus "-" option to an older server if there were
no short options specified.
diff --git a/options.c b/options.c
index aebfdf8..71fda24 100644
--- a/options.c
+++ b/options.c
@@ -1840,7 +1840,8 @@
 
 	argstr[x] = '\0';
 
-	args[ac++] = argstr;
+	if (x > 1)
+		args[ac++] = argstr;
 
 #ifdef ICONV_OPTION
 	if (iconv_opt) {