Fix initialization order of objc._objc

The previous order initialized exception classes after their
first use. This happens to work on older python versions, but
crashes 3.12 by way of a NULL pointer dereference.

Fixes #551

docs/changelog.rst

@@ -13,6 +13,8 @@ Version 9.2
   backend by default. Add a minimal ``pyproject.toml`` to get a consistent
   build regardless of the version of pip
 
+* :issue:`551`: Fix crash in pyobjc-core when using Python 3.12a7.
+
 Version 9.1.1
 -------------
 

pyobjc-core/Modules/objc/module.m

@@ -2204,6 +2204,7 @@ + (void)targetForBecomingMultiThreaded:(id)sender
 static setup_function _Nullable setup_functions[] = {
     PyObjC_InitProxyRegistry, /* Must be first */
 
+    PyObjCUtil_Init,
     PyObjCPointerWrapper_Init,
     PyObjC_SetupOptions,
     PyObjC_setup_nsdecimal,
@@ -2220,7 +2221,6 @@ + (void)targetForBecomingMultiThreaded:(id)sender
     PyObjCMemView_Setup,
     PyObjCWeakRef_Setup,
     PyObjCMethodAccessor_Setup,
-    PyObjCUtil_Init,
     PyObjCIMP_SetUp,
     PyObjC_init_ctests,
     PyObjCSelector_Setup,