tcpconnect: follow-up commit after b998d95b

As I modified conn->bits.tcpconnect to become an array that holds one
bool for each potential connection all uses of that struct field must
index it correctly.

lib/imap.c

@@ -841,7 +841,7 @@ CURLcode imap_perform(struct connectdata *conn,
     result = imap_easy_statemach(conn);
     *dophase_done = TRUE; /* with the easy interface we are done here */
   }
-  *connected = conn->bits.tcpconnect;
+  *connected = conn->bits.tcpconnect[FIRSTSOCKET];
 
   if(*dophase_done)
     DEBUGF(infof(conn->data, "DO phase is complete\n"));