enable the Trace, Statistics, and Serialize param contexts.

objects/Root.mpy:
    Fake the param context stuff for now.
sim/param.cc:
    Make empty vector enums work
sim/serialize.cc:
    serialize_dir is always valid

--HG--
extra : convert_revision : c46373f0f4c70e6a2f01a81c0fa6bacab72d4c4f

1 files changed, 5 insertions, 0 deletions

diff --git a/sim/param.cc b/sim/param.cc
index d16578a2d..ff023ce85 100644
--- a/sim/param.cc
+++ b/sim/param.cc
@@ -441,6 +441,11 @@ EnumVectorParam<Map>::parse(const string &s)
 {
     vector<string> tokens;
 
+    if (s.empty()) {
+        wasSet = true;
+        return;
+    }
+
     tokenize(tokens, s, ' ');
 
     value.resize(tokens.size());