Add a space in an error message. No review -- obvious typo.

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@2388 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/datasrc/data_source.cc

@@ -1025,7 +1025,7 @@ DataSrc::doQuery(Query& q) {
                 result = addSOA(q, zoneinfo);
                 if (result != SUCCESS) {
                     isc_throw(DataSourceError,
-                              "SOA RR not found in" << *zonename <<
+                              "SOA RR not found in " << *zonename <<
                               "/" << q.qclass());
                 }
             }