Fix NRE in Assembly ctor on < v24.2

Il2CppInspector.Common/Reflection/Assembly.cs

@@ -71,7 +71,8 @@ namespace Il2CppInspector.Reflection {
                 // TODO: Generate EntryPoint method from entryPointIndex
             }
 
-            // Find corresponding module (we'll need this for method pointers)
+            // Find corresponding module (we'll need this for method pointers on V24.2+)
+            if (Model.Package.Modules != null)
                 ModuleDefinition = Model.Package.Modules[ShortName];
 
             // Generate types in DefinedTypes from typeStart to typeStart+typeCount-1