Add description of solution to avoiding recursive calls

wasmlike/func_notes.txt

@@ -47,6 +47,9 @@ I'll probably name them and refer to them by name during generation.
 It might be easy to hook into the current local machinery though, and choose a random index after
 adding the number of parameters to the count though.... Less work this way, but less precise.
 
-
+To avoid recursive calls: each function should maintain a blacklist.
+    * Each function starts with itself in the list
+    * Whenever a call is made/generated: add the caller to the callee's list
+    * A function cannot call a function inside its own list