Feature/memory arena (#631)

* First pass at MemoryArena.

* First pass at RandomGenerator.

* Extract TestContext into external source file.

* Fix warning on printf.

* Use enum classes for Test enums.
OutputMode -> TestOutputMode.

* First pass at FreeList unit test.

* Auto registering tests.
Improvements to RandomGenerator.

* Remove the need for unitTest headers - cos can use registering.

* Added unitTest for MemoryArena.

* Do unit tests.

* Fix typo.

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/render-test/main.cpp b/tools/render-test/main.cpp
index 4734c2c8f..77e077b6c 100644
--- a/tools/render-test/main.cpp
+++ b/tools/render-test/main.cpp
@@ -338,7 +338,7 @@ Result RenderTestApp::writeBindingOutput(const char* fileName)
             }
             else
             {
-                printf("invalid output type at %d.\n", i);
+                printf("invalid output type at %d.\n", int(i));
             }
         }
     }