fix: update return types of objc_lookUpClass and objc_getRequiredClass to Class

Author: FloofyPlasma

class_table.c

@@ -564,9 +564,9 @@ id objc_getClass(const char *name)
 	return class;
 }
 
-id objc_lookUpClass(const char *name)
+Class objc_lookUpClass(const char *name)
 {
-	return (id)class_table_get_safe(name);
+	return class_table_get_safe(name);
 }
 
 

objc/runtime.h

@@ -628,14 +628,14 @@ id objc_getMetaClass(const char *name);
  * that all required libraries are loaded.
  */
 OBJC_PUBLIC
-id objc_getRequiredClass(const char *name);
+Class objc_getRequiredClass(const char *name);
 
 /**
  * Looks up the class with the specified name, but does not invoke any
  * external lazy loading mechanisms.
  */
 OBJC_PUBLIC
-id objc_lookUpClass(const char *name);
+Class objc_lookUpClass(const char *name);
 
 /**
  * Returns the protocol with the specified name.

runtime.c

@@ -628,10 +628,10 @@ IMP method_setImplementation(Method method, IMP imp)
 	return old;
 }
 
-id objc_getRequiredClass(const char *name)
+Class objc_getRequiredClass(const char *name)
 {
 	CHECK_ARG(name);
-	id cls = objc_getClass(name);
+	Class cls = (Class)objc_getClass(name);
 	if (nil == cls)
 	{
 		abort();