utils/cache_gc: fix debug prints

The difference is on "negative" char values, in which case
the prints were way too long.

diff --git a/utils/cache_gc/db.c b/utils/cache_gc/db.c
index 0ab829b9e95459b48246afc08316b0df46e02909..e0ee43df1544d7c1e75d00c90fb0311ebcca926a 100644 (file)
--- a/utils/cache_gc/db.c
+++ b/utils/cache_gc/db.c
@@ -128,7 +128,7 @@ void debug_printbin(const char *str, unsigned int len)
                if (isprint(c))
                        putchar(c);
                else
-                       printf("`%02x`", c);
+                       printf("`%02hhx`", c);
        }
        putchar('"');
 }