Shader: backport struct fix from phong-lighting

src/Nazara/Shader/Ast/SanitizeVisitor.cpp

@@ -202,7 +202,7 @@ namespace Nz::ShaderAst
 					else
 						accessIdentifierPtr = static_cast<AccessIdentifierExpression*>(indexedExpr.get());
 
-					accessIdentifierPtr->identifiers.push_back(s->members[fieldIndex].name);
+					accessIdentifierPtr->identifiers.push_back(fieldPtr->name);
 					accessIdentifierPtr->cachedExpressionType = ResolveType(fieldPtr->type);
 				}
 				else

src/Nazara/Shader/GlslWriter.cpp

@@ -1118,6 +1118,9 @@ namespace Nz
 			bool first = true;
 			for (const auto& member : node.description.members)
 			{
+				if (member.cond.HasValue() && !member.cond.GetResultingValue())
+					continue;
+
 				if (!first)
 					AppendLine();