Addresses #1577 Don't forget about buffers in memarena when one buffer gets full

git-svn-id: file:///svn/toku/tokudb@10499 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/memarena.c

@@ -52,6 +52,7 @@ void* malloc_in_memarena (MEMARENA ma, size_t size) {
 	    assert(ma->other_bufs);
 	    ma->other_bufs[old_n]=ma->buf;
 	    ma->n_other_bufs = old_n+1;
+            ma->size_of_other_bufs += ma->buf_size;
 	}
 	// Make a new one
 	{