rustls: drop two wrong leftover casts to `ssize_t`

While both source and target types are already `size_t`.

Spotted by GitHub Code Quality

Follow-up to b7c676d13f0988bde9bb0e4c3cfc688072cdb2e0 #17593

Closes #21625

diff --git a/lib/vtls/rustls.c b/lib/vtls/rustls.c
index e9646d2dc0f85711bb8a2f5226dbffc23582aa5c..57591949527c0cf39567d9f35337310bab785daf 100644 (file)
--- a/lib/vtls/rustls.c
+++ b/lib/vtls/rustls.c
@@ -337,7 +337,7 @@ static CURLcode cr_send(struct Curl_cfilter *cf, struct Curl_easy *data,
     }
     else
       blen = 0;
-    *pnwritten += (ssize_t)backend->plain_out_buffered;
+    *pnwritten += backend->plain_out_buffered;
     backend->plain_out_buffered = 0;
   }
 
@@ -370,7 +370,7 @@ static CURLcode cr_send(struct Curl_cfilter *cf, struct Curl_easy *data,
     goto out;
   }
   else
-    *pnwritten += (ssize_t)plainwritten;
+    *pnwritten += plainwritten;
 
 out:
   CURL_TRC_CF(data, cf, "rustls_send(len=%zu) -> %d, %zu",