url: fix compiler warning in no-verbose builds

Follow-up from 2f0bb864c12

Closes #7700

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/url.c b/lib/url.c
index b672710c5..37b6c0e84 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -1893,9 +1893,11 @@ static void zonefrom_url(CURLU *uh, struct Curl_easy *data,
       scopeidx = if_nametoindex(zoneid);
 #endif
       if(!scopeidx) {
+#ifndef CURL_DISABLE_VERBOSE_STRINGS
         char buffer[STRERROR_LEN];
         infof(data, "Invalid zoneid: %s; %s", zoneid,
               Curl_strerror(errno, buffer, sizeof(buffer)));
+#endif
       }
       else
         conn->scope_id = scopeidx;