Fix Curl_open() not reporting failure when allocation of the

buffer used to store headers in the SessionHandle failed.

lib/url.c

@@ -564,9 +564,10 @@ CURLcode Curl_open(struct SessionHandle **curl)
     free(data);
     data = NULL;
   }
+  else
+    *curl = data;
 
-  *curl = data;
-  return CURLE_OK;
+  return res;
 }
 
 CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,