OS-1571 Placate gcc -Wparentheses
Reviewed by: Robert Mustacchi <rm@joyent.com>

*** 1168,1178 ****
                  zerror(zlogp, B_TRUE, "failed to add standard symlink");
                  goto cleanup;
          }
  
          /* Add user-specified devices and directories */
!         if (err = zonecfg_setdevent(snap_hndl)) {
                  zerror(zlogp, B_FALSE, "%s: %s", zone_name,
                      zonecfg_strerror(err));
                  goto cleanup;
          }
          while (zonecfg_getdevent(snap_hndl, &ztab) == Z_OK) {
--- 1168,1178 ----
                  zerror(zlogp, B_TRUE, "failed to add standard symlink");
                  goto cleanup;
          }
  
          /* Add user-specified devices and directories */
!         if ((err = zonecfg_setdevent(snap_hndl)) != 0) {
                  zerror(zlogp, B_FALSE, "%s: %s", zone_name,
                      zonecfg_strerror(err));
                  goto cleanup;
          }
          while (zonecfg_getdevent(snap_hndl, &ztab) == Z_OK) {