CamelIMAPXServer: Work around crash in imapx_exit_idle().
CamelIMAPXServer: Work around crash in imapx_exit_idle().

g_cond_clear() doesn't like being given an uninitialized GCond.

The "start_watch_cond" and "start_watch_exit" structures are being
cleared unconditionally, so we should initialize them unconditionally.

Distrotech/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server,tintou/evolution-data-server,tintou/evolution-data-server,Distrotech/evolution-data-server,tintou/evolution-data-server,Distrotech/evolution-data-server,Distrotech/evolution-data-server,matzipan/evolution-data-server,tintou/evolution-data-server,matzipan/evolution-data-server,Distrotech/evolution-data-server