[t:4105], small fix to test, not done with ticket yet

git-svn-id: file:///svn/toku/tokudb@36743 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/tests/cachetable-test.c

@@ -315,6 +315,7 @@ static int fetch_n (CACHEFILE f __attribute__((__unused__)), int UU(fd), CACHEKE
     assert((long)extraargs==42);
     *value=0;
     *dirtyp = 0;
+    *sizep = make_pair_attr(0);
     return 0;
 }