Improve CONFIG_WORLD_USE_BODY_THREAD handling

We no longer need to do ugly ifdefs in the constructor for
Mind::Mind because we preprocess the handling for BODY and WORLD
in SmoThreadIds.

smocore/mind.cpp

@@ -1,3 +1,4 @@
+#include <config.h>
 #include <iostream>
 #include <opts.h>
 #include <spinscale/asynchronousContinuation.h>
@@ -23,18 +24,13 @@ Mind::Mind(void)
 #ifndef CONFIG_WORLD_USE_BODY_THREAD
 			, std::make_shared<MindThread>(SmoThreadId::WORLD, *this)
 #endif
-		}),
-	director(*this, std::static_pointer_cast<sscl::ComponentThread>(componentThreads[0])),
-	canvas(*this, std::static_pointer_cast<sscl::ComponentThread>(componentThreads[1])),
-	subconscious(*this, std::static_pointer_cast<sscl::ComponentThread>(componentThreads[2])),
-	body(*this, std::static_pointer_cast<sscl::ComponentThread>(componentThreads[3])),
-	world(*this,
-#ifndef CONFIG_WORLD_USE_BODY_THREAD
-		std::static_pointer_cast<sscl::ComponentThread>(componentThreads[4])
-#else
-		std::static_pointer_cast<sscl::ComponentThread>(componentThreads[3])
-#endif
-	)
+		}
+	),
+director(*this, componentThreads[SmoThreadId::DIRECTOR - 1]),
+canvas(*this, componentThreads[SmoThreadId::SIMULATOR - 1]),
+subconscious(*this, componentThreads[SmoThreadId::SUBCONSCIOUS - 1]),
+body(*this, componentThreads[SmoThreadId::BODY - 1]),
+world(*this, componentThreads[SmoThreadId::WORLD - 1])
 {
 }