Add optional Init(). This can be used so that HOOKS is set and accessible during the child crash handler by moving that code to Init().

stepmania/src/StepMania.cpp

@@ -917,7 +917,7 @@ int main(int argc, char* argv[])
 
 	/* Set up arch hooks first.  This may set up crash handling. */
 	HOOKS = MakeArchHooks();
-
+	HOOKS->Init();
 #if !defined(DEBUG)
 	/* Tricky: for other exceptions, we want a backtrace.  To do this in Windows,
 	 * we need to catch the exception and force a crash.  The call stack is still

stepmania/src/arch/ArchHooks/ArchHooks.h

@@ -5,7 +5,7 @@ class ArchHooks
 {
 public:
 	virtual ~ArchHooks() { }
-
+	virtual void Init() { }
 	/*
 	 * Return the general name of the architecture, eg. "Windows", "OS X", "Unix".
 	 */