Do not block system messages when block_unsubscribed is set
This was broken in 0.10.0 when switching to LM.
Reported by roughnecks in the MUC room, issue spotted by Hermitifier.
prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
includedir=@includedir@
Name: MCabber
Description: Modular XMPP client
Requires: glib-2.0 gmodule-2.0 loudmouth-1.0
Version: @VERSION@
Libs:
Cflags: -I${includedir} @LIBOTR_CFLAGS@ @GPGME_CFLAGS@