just to save a PR: default asset visitor variables to emptystring

Engine/source/assets/tamlAssetDeclaredUpdateVisitor.h

@@ -49,7 +49,10 @@ private:
     StringTableEntry mAssetNameTo;
 
 public:
-    TamlAssetDeclaredUpdateVisitor() {}
+    TamlAssetDeclaredUpdateVisitor():
+       mAssetIdFrom(StringTable->EmptyString()), mAssetIdTo(StringTable->EmptyString()),
+       mAssetNameFrom(StringTable->EmptyString()), mAssetNameTo(StringTable->EmptyString()) {}
+
     virtual ~TamlAssetDeclaredUpdateVisitor() {}
 
     void setAssetIdFrom( const char* pAssetIdFrom )

Engine/source/assets/tamlAssetReferencedUpdateVisitor.h

@@ -55,7 +55,7 @@ private:
     StringTableEntry mAssetIdTo;
 
 public:
-    TamlAssetReferencedUpdateVisitor() {}
+    TamlAssetReferencedUpdateVisitor() : mAssetIdFrom(StringTable->EmptyString()), mAssetIdTo(StringTable->EmptyString()) {}
     virtual ~TamlAssetReferencedUpdateVisitor() {}
 
     void setAssetIdFrom( const char* pAssetIdFrom )