Print with more-restricted format string to fix compiler warning

with gcc 7's -Wformat-truncation.

1 files changed, 1 insertions, 1 deletions

diff --git a/util.c b/util.c
index f6a3d91..0ccbe4d 100644
--- a/util.c
+++ b/util.c
@@ -18,7 +18,7 @@ void uriencode_init(void) {
         if (isalnum(x) || x == '-' || x == '.' || x == '_' || x == '~') {
             uriencode_map[x] = NULL;
         } else {
-            snprintf(str, 4, "%%%02X", x);
+            snprintf(str, 4, "%%%02hhX", (unsigned char)x);
             uriencode_map[x] = str;
             str += 3; /* lobbing off the \0 is fine */
         }