vtls: fix compiler warning for TLS backends without sha256

... noticed with mbedTLS.

diff --git a/lib/vtls/vtls.c b/lib/vtls/vtls.c
index f359cd5d53d5061358764ad48eb9af68407aae84..96ff61301d5b41ea4c22e3f870e60427d53e71a4 100644 (file)
--- a/lib/vtls/vtls.c
+++ b/lib/vtls/vtls.c
@@ -845,6 +845,8 @@ CURLcode Curl_pin_peer_pubkey(struct SessionHandle *data,
     Curl_safefree(pinkeycopy);
     return result;
   }
+#else
+  (void)data;
 #endif
 
   fp = fopen(pinnedpubkey, "rb");