Remove the missing procedures fallback from the backend: the checker adds the Objective-C runtime procedures the backend calls, local foreign procedures with a duplicate name are bound to the existing declaration, and local procedures passed to a $ parameter are created up front

src/entity.cpp

@@ -76,7 +76,8 @@ enum EntityFlag : u64 {
 	EntityFlag_Init          = 1ull<<31,
 	EntityFlag_Subtype       = 1ull<<32,
 	EntityFlag_Fini          = 1ull<<33,
-	
+	EntityFlag_PolyConstArg  = 1ull<<34, // passed to a `$` parameter, so a local procedure may be called outside its parent
+
 	EntityFlag_CustomLinkName = 1ull<<40,
 	EntityFlag_CustomLinkage_Internal = 1ull<<41,
 	EntityFlag_CustomLinkage_Strong   = 1ull<<42,