py: Wrap all obj-ptr conversions in MP_OBJ_TO_PTR/MP_OBJ_FROM_PTR.

This allows the mp_obj_t type to be configured to something other than a
pointer-sized primitive type.

This patch also includes additional changes to allow the code to compile
when sizeof(mp_uint_t) != sizeof(void*), such as using size_t instead of
mp_uint_t, and various casts.

1 files changed, 1 insertions, 1 deletions

diff --git a/py/bc.h b/py/bc.h
index 04575cee5..b660240c9 100644
--- a/py/bc.h
+++ b/py/bc.h
@@ -66,7 +66,7 @@ typedef struct _mp_exc_stack {
     // bit 1 is whether the opcode was SETUP_WITH or SETUP_FINALLY
     mp_obj_t *val_sp;
     // Saved exception, valid if currently_in_except_block bit is 1
-    mp_obj_t prev_exc;
+    mp_obj_base_t *prev_exc;
 } mp_exc_stack_t;
 
 typedef struct _mp_code_state {