Make sure state maps define rules for all entries

src/ObjLoading/StateMap/StateMapReader.cpp

@@ -31,6 +31,15 @@ bool StateMapReader::IsValidEndState(const StateMapParserState* state) const
         return false;
     }
 
+    for (auto i = 0u; i < state->m_layout.m_layout_entries.size(); i++)
+    {
+        if (state->m_definition->m_state_map_entries[i].m_rules.empty())
+        {
+            std::cerr << "In \"" << m_file_name << "\": State map must define a rule for \"" << state->m_layout.m_layout_entries[i].m_name << "\"!\n";
+            return false;
+        }
+    }
+
     return true;
 }