sync up our in tree sqlite with the 3.3.13 official release. Commit to follow to finish this process on the windows build.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4351 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/sqlite/src/vdbemem.c

@@ -137,6 +137,7 @@ int sqlite3VdbeMemNulTerminate(Mem *pMem){
     }
     pMem->xDel = 0;
     pMem->z = z;
+    pMem->flags |= MEM_Term;
   }
   return SQLITE_OK;
 }