Fix output testcase. Graphics must be initialized now because Output forwards to the MessageOverlay.

Author: Ghabry

tests/output.cpp

@@ -1,7 +1,9 @@
+#include "graphics.h"
 #include "output.h"
 #include "main_data.h"
 
 int main(int, char**) {
+  Graphics::Init();
   Main_Data::Init();
   Output::Debug("Test %s", "debg");
   Output::Warning("Test %s", "test");