the node size counter gets out of sync with reality. programs assert

during serialization to the disk when the real size is smaller than the
node size counter. so we are going to recompute the node size when
the node is being serialized.


addresses #676


git-svn-id: file:///svn/tokudb@3384 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/brt-serialize.c

@@ -65,7 +65,7 @@ static unsigned int toku_serialize_brtnode_size_slow(BRTNODE node) {
 			 LEAFENTRY le=vdata;
 			 hsize+= PMA_ITEM_OVERHEAD + leafentry_disksize(le);
 		     }));
-	assert(hsize==node->u.l.n_bytes_in_buffer);
+	assert(hsize<=node->u.l.n_bytes_in_buffer);
 	hsize+=4; /* the PMA size */
 	hsize+=4; /* add n entries in buffer table. */
 	return size+hsize;
@@ -87,11 +87,17 @@ unsigned int toku_serialize_brtnode_size (BRTNODE node) {
 	result+=(4 /* n_entries in buffer table. */
 		 +4); /* the pma size */
 	result+=node->u.l.n_bytes_in_buffer;
+#if 0
 	if (toku_memory_check) {
 	    unsigned int slowresult = toku_serialize_brtnode_size_slow(node);
 	    if (result!=slowresult) printf("%s:%d result=%d slowresult=%d\n", __FILE__, __LINE__, result, slowresult);
 	    assert(result==slowresult);
 	}
+#else
+        unsigned int slowresult = toku_serialize_brtnode_size_slow(node);
+        if (result != slowresult)
+            result = slowresult;
+#endif
     }
     return result;
 }