Clarify error, add Introspection to full test

src/Introspection.cake

@@ -902,6 +902,7 @@
       (var in-file (* FILE) (fopen "Errors.cakedata" "r"))
       (unless in-file (return 1))
       (var file-contents (* (const char)) (read-file-into-memory in-file))
+      (fprintf stderr "note: I expect to fail to read struct from Errors.cakedata\n")
       (when (read-introspect-struct-s-exp (addr my-struct--metadata) (addr read-struct)
                                           file-contents malloc)
         (fprintf stderr "error: expected to fail to read struct from Errors.cakedata\n")

test/src/GameLibTests.cake

@@ -66,7 +66,8 @@
       (array platform-config
              "../src/AutoTest.cake" "../src/SDL.cake" "../src/Math.cake"
              "../src/Aubio.cake" "../src/ImGui.cake" "../src/Dictionary.cake"
-             "../src/DynamicArray.cake" "../src/OpenGL.cake" "../src/Tracy.cake"))
+             "../src/DynamicArray.cake" "../src/Introspection.cake" "../src/OpenGL.cake"
+             "../src/Tracy.cake"))
 
      ;; Because auto-instrumentation does not play nice with AutoTest
      (gamelib-run-test "Profiler auto-instrument"