[Tracker] build failure if build twice in a row

[Michael Biebl <mbiebl gmail com>]

Hi,

I'm getting build failures if I try to build tracker (0.7.16) twice in a row:
If you want to reproduce it, try the following:

# wget http://ftp.gnome.org/pub/GNOME/sources/tracker/0.7/tracker-0.7.16.tar.gz
# tar xf tracker-0.7.16.tar.gz && cd tracker-0.7.16
#./configure && make && make clean
  <builds fine>
# ./configure && make && make clean
...
make[5]: Entering directory `/tmp/tracker-0.7.16/src/plugins/kmail'
  CC     tracker-kmail-registrar.lo
tracker-kmail-registrar.c:40:42: error:
tracker-kmail-registrar-glue.h: No such file or directory
tracker-kmail-registrar.c: In function 'tracker_kmail_push_registrar_enable':
tracker-kmail-registrar.c:606: error:
'dbus_glib_tracker_kmail_registrar_object_info' undeclared (first use
in this function)
tracker-kmail-registrar.c:606: error: (Each undeclared identifier is
reported only once
tracker-kmail-registrar.c:606: error: for each function it appears in.)
make[5]: *** [tracker-kmail-registrar.lo] Error 1
make[5]: Leaving directory `/tmp/tracker-0.7.16/src/plugins/kmail'
make[4]: *** [all] Error 2
make[4]: Leaving directory `/tmp/tracker-0.7.16/src/plugins/kmail'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/tmp/tracker-0.7.16/src/plugins'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/tmp/tracker-0.7.16/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/tracker-0.7.16'
make: *** [all] Error 2


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