Give cap its correct type, rather than void

rts/Main.c

@@ -101,7 +101,7 @@ int main(int argc, char *argv[])
 
     /* ToDo: want to start with a larger stack size */
     { 
-	void *cap = rts_lock();
+	Capability *cap = rts_lock();
 	cap = rts_evalLazyIO(cap,(HaskellObj)(void *)mainIO_closure, NULL);
 	status = rts_getSchedStatus(cap);
 	taskTimeStamp(myTask());