Fix an OOS on rejoin caused by ParamNode.cpp using an invalid node cache. Patch by leper, fixes #4316.

Reuse the temple of vesta inheritance from 06bf79b7e8 which was affected
by this bug.

This was SVN commit r18942.

binaries/data/mods/public/simulation/templates/structures/rome_temple_vesta.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Entity parent="template_structure_civic_temple">
+<Entity parent="structures/rome_temple">
   <Auras datatype="tokens">loyalty_regen</Auras>
   <BuildRestrictions>
     <Category>UniqueBuilding</Category>
@@ -12,7 +12,6 @@
     <SpawnEntityOnDeath>rubble/rubble_3x3</SpawnEntityOnDeath>
   </Health>
   <Identity>
-    <Civ>rome</Civ>
     <GenericName>Temple of Vesta</GenericName>
     <Icon>structures/temple_vesta.png</Icon>
     <SpecificName>Aedes Vestae</SpecificName>
@@ -20,11 +19,6 @@
   <Obstruction>
     <Static width="19.0" depth="19.0"/>
   </Obstruction>
-  <ProductionQueue>
-    <Technologies datatype="tokens">
-      romans/vision_sibylline
-    </Technologies>
-  </ProductionQueue>
   <VisualActor>
     <Actor>structures/romans/temple_vesta.xml</Actor>
     <FoundationActor>structures/fndn_3x3.xml</FoundationActor>

source/simulation2/system/ParamNode.cpp

@@ -171,6 +171,10 @@ void CParamNode::ApplyLayer(const XMBFile& xmb, const XMBElement& element, const
 	if (!hasSetValue)
 		node.m_Value = value;
 
+	// We also need to reset node's script val, even if it has no children
+	// or if the attributes change.
+	node.ResetScriptVal();
+
 	// Recurse through the element's children
 	XERO_ITER_EL(element, child)
 	{