BUG/MINOR: build: fix event ports (Solaris)

Patch 6b308985 "MEDIUM: fd: do not use the FD_POLL_* flags in the
pollers anymore" break ev_evports.c build. Restore variable name
to fix it.
diff --git a/src/ev_evports.c b/src/ev_evports.c
index e734b22..bde617d 100644
--- a/src/ev_evports.c
+++ b/src/ev_evports.c
@@ -241,10 +241,10 @@
 		/*
 		 * Set bits based on the events we received from the port:
 		 */
-		n = ((e & POLLIN)    ? FD_EV_READY_R : 0) |
-		    ((e & POLLOUT)   ? FD_EV_READY_W : 0) |
-		    ((e & POLLHUP)   ? FD_EV_SHUT_RW : 0) |
-		    ((e & POLLERR)   ? FD_EV_ERR_RW  : 0);
+		n = ((events & POLLIN)  ? FD_EV_READY_R : 0) |
+		    ((events & POLLOUT) ? FD_EV_READY_W : 0) |
+		    ((events & POLLHUP) ? FD_EV_SHUT_RW : 0) |
+		    ((events & POLLERR) ? FD_EV_ERR_RW  : 0);
 
 		/*
 		 * Call connection processing callbacks.  Note that it's