emacs-27 4537976: Port .gdbinit to clang with -gdwarf-4

[Paul Eggert]

branch: emacs-27
commit 4537976afda2dfe2d20f2f572ca64c71ec8425ec
Author: Paul Eggert <address@hidden>
Commit: Paul Eggert <address@hidden>

    Port .gdbinit to clang with -gdwarf-4
    
    * src/.gdbinit (xgetsym): Port to clang with -gdwarf-4, which
    doesn’t output the type of lispsym anywhere other than emacs.o
    (Bug#39962).
---
 src/.gdbinit | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/.gdbinit b/src/.gdbinit
index 5dd0133..30c7b05 100644
--- a/src/.gdbinit
+++ b/src/.gdbinit
@@ -72,7 +72,7 @@ end
 
 define xgetsym
   xgetptr $arg0
-  set $ptr = ((struct Lisp_Symbol *) ((char *)lispsym + $ptr))
+  set $ptr = ((struct Lisp_Symbol *) ((char *) &lispsym + $ptr))
 end
 
 # Access the name of a symbol