detect/ftp: fix -Wshorten-64-to-32 warnings

Ticket: #6186

src/detect-ftp-completion-code.c

@@ -72,7 +72,7 @@ static bool DetectFTPCompletionCodeGetData(DetectEngineThreadCtx *_det_ctx, cons
             DEBUG_VALIDATE_BUG_ON(wrapper->response == NULL);
             if (index == count) {
                 *buffer = (const uint8_t *)wrapper->response->code;
-                *buffer_len = wrapper->response->code_length;
+                *buffer_len = (uint32_t)wrapper->response->code_length;
                 return true;
             }
             count++;

src/output-json-ftp.c

@@ -105,7 +105,7 @@ bool EveFTPLogCommand(void *vtx, SCJsonBuilder *jb)
                     is_cc_array_open = true;
                 }
                 SCJbAppendStringFromBytes(
-                        jb, (const uint8_t *)response->code, response->code_length);
+                        jb, (const uint8_t *)response->code, (uint32_t)response->code_length);
             }
             if (response->length) {
                 SCJbAppendStringFromBytes(js_resplist, (const uint8_t *)response->response,