avoid warning: enum constant in boolean context

diff --git a/lib/transfer.c b/lib/transfer.c
index f9cdcd1d81758434788068ddb215b88456b27361..c0e87f708d91b18121f5a3dd5ead698813abcd2e 100644 (file)
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -435,7 +435,7 @@ CURLcode Curl_readrewind(struct Curl_easy *data)
     ; /* do nothing */
   else if(data->state.httpreq == HTTPREQ_POST_MIME ||
           data->state.httpreq == HTTPREQ_POST_FORM) {
-    if(Curl_mime_rewind(mimepart)) {
+    if(Curl_mime_rewind(mimepart) != CURLE_OK) {
       failf(data, "Cannot rewind mime/post data");
       return CURLE_SEND_FAIL_REWIND;
     }