Make a function for get_itbl, rather than using a CPP macro

This has several advantages:
* It can be called from gdb
* There is more type information for the user, and type checking
  for the compiler
* Less opportunity for things to go wrong, e.g. due to missing
  parentheses or repeated execution

The sizes of the non-debug .o files hasn't changed (other than
Inlines.o), so I'm pretty sure the compiled code is identical.

1 files changed, 1 insertions, 1 deletions

diff --git a/rts/RaiseAsync.c b/rts/RaiseAsync.c
index 9e5a8c3b2f..47d88068bf 100644
--- a/rts/RaiseAsync.c
+++ b/rts/RaiseAsync.c
@@ -306,7 +306,7 @@ check_target:
 
 	// ASSUMPTION: tso->block_info must always point to a
 	// closure.  In the threaded RTS it does.
-        switch (get_itbl(mvar)->type) {
+        switch (get_itbl((StgClosure *)mvar)->type) {
         case MVAR_CLEAN:
         case MVAR_DIRTY:
             break;