nightly build of rev 6998 failes

the loglines where it failes:

Making all in zbxdbhigh
make[4]: Entering directory `/tmp/buildd/zabbix-1.7/src/libs/zbxdbhigh'
if x86_64-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I../../../include -I../../../src/zabbix_server/ -Wall -g -O2 -I/usr/include/mysql -DBIG_JOINS=1 -fPIC -I/usr/local/include -I/usr/lib/perl/5.10/CORE -I. -I/usr/include -MT libzbxdbhigh_a-host.o -MD -MP -MF ".deps/libzbxdbhigh_a-host.Tpo" -c -o libzbxdbhigh_a-host.o `test -f 'host.c' || echo './'`host.c; \
then mv -f ".deps/libzbxdbhigh_a-host.Tpo" ".deps/libzbxdbhigh_a-host.Po"; else rm -f ".deps/libzbxdbhigh_a-host.Tpo"; exit 1; fi
if x86_64-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I../../../include -I../../../src/zabbix_server/ -Wall -g -O2 -I/usr/include/mysql -DBIG_JOINS=1 -fPIC -I/usr/local/include -I/usr/lib/perl/5.10/CORE -I. -I/usr/include -MT libzbxdbhigh_a-db.o -MD -MP -MF ".deps/libzbxdbhigh_a-db.Tpo" -c -o libzbxdbhigh_a-db.o `test -f 'db.c' || echo './'`db.c; \
then mv -f ".deps/libzbxdbhigh_a-db.Tpo" ".deps/libzbxdbhigh_a-db.Po"; else rm -f ".deps/libzbxdbhigh_a-db.Tpo"; exit 1; fi
make[4]: *** No rule to make target `dbschema.c', needed by `libzbxdbhigh_a-dbschema.o'. Stop.
make[4]: Leaving directory `/tmp/buildd/zabbix-1.7/src/libs/zbxdbhigh'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/tmp/buildd/zabbix-1.7/src/libs'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/tmp/buildd/zabbix-1.7/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/buildd/zabbix-1.7'
make: *** [build-server-mysql] Error 2