opt: Fix warnings with gcc-4.5 (same approach as commit 6535bde)

[ccan] / ccan / opt / usage.c

diff --git a/ccan/opt/usage.c b/ccan/opt/usage.c
index eedaae7eb821d0dab8114de49222b14496887aa0..60e1586861adc0981a5bf0eaf00bc63bcff450a4 100644 (file)
--- a/ccan/opt/usage.c
+++ b/ccan/opt/usage.c
@@ -93,7 +93,7 @@ char *opt_usage(const char *argv0, const char *extra)
                        len += sprintf(p + len, " <arg>");
                len += sprintf(p + len, "%.*s",
                               len < strlen(OPT_SPACE_PAD)
-                              ? strlen(OPT_SPACE_PAD) - len : 1,
+                              ? (unsigned)strlen(OPT_SPACE_PAD) - len : 1,
                               OPT_SPACE_PAD);
 
                len += sprintf(p + len, "%s", opt_table[i].desc);