Merge pull request #138 from Wire-Network/feature/test-fix-snapshot

Test: nodeos_snapshot_diff_test - wait for snapshot

Author: heifner

tests/nodeop_snapshot_diff_test.py

@@ -184,7 +184,7 @@ def waitForBlock(node, blockNum, blockType=BlockType.head, timeout=None, reportI
     nodeIrr.relaunch()
 
     Print("Wait for programmable node lib to advance")
-    waitForBlock(nodeProg, ret_head_block_num, blockType=BlockType.lib)
+    waitForBlock(nodeProg, ret_head_block_num+1, blockType=BlockType.lib)
 
     Print("Kill programmable node")
     nodeProg.kill(signal.SIGTERM)