tool_operate: Fix CURLOPT_SSL_OPTIONS for builds without HTTPS

- Set CURLOPT_SSL_OPTIONS only if the tool enabled an SSL option.

Broken by me several days ago in 172b2be.
172b2be#diff-70b44ee478e58d4e1ddcf9c9a73d257b

Bug: http://curl.haxx.se/mail/lib-2015-07/0119.html
Reported-by: Dan Fandrich

src/tool_operate.c

@@ -1328,9 +1328,12 @@ static CURLcode operate_do(struct GlobalConfig *global,
                         config->gssapi_delegation);
 
         /* new in 7.25.0 */
-        my_setopt_bitmask(curl, CURLOPT_SSL_OPTIONS,
-          (long)((config->ssl_allow_beast ? CURLSSLOPT_ALLOW_BEAST : 0) |
-                 (config->ssl_no_revoke ? CURLSSLOPT_NO_REVOKE : 0)));
+        {
+          long mask = (config->ssl_allow_beast ? CURLSSLOPT_ALLOW_BEAST : 0) |
+                      (config->ssl_no_revoke ? CURLSSLOPT_NO_REVOKE : 0);
+          if(mask)
+            my_setopt_bitmask(curl, CURLOPT_SSL_OPTIONS, mask);
+        }
 
         if(config->mail_auth)
           my_setopt_str(curl, CURLOPT_MAIL_AUTH, config->mail_auth);