opt: add an int decrementing helper function

[ccan] / ccan / opt / helpers.c

diff --git a/ccan/opt/helpers.c b/ccan/opt/helpers.c
index e531a7d3aa2bc9d250e0608f21f0604d66e13733..c557f96d8488d01d3e1297ea235f6c2c8b76fb4f 100644 (file)
--- a/ccan/opt/helpers.c
+++ b/ccan/opt/helpers.c
@@ -165,6 +165,12 @@ char *opt_inc_intval(int *i)
        return NULL;
 }
 
+char *opt_dec_intval(int *i)
+{
+       (*i)--;
+       return NULL;
+}
+
 /* Display version string. */
 char *opt_version_and_exit(const char *version)
 {