Eric Pouech : winedump: Fix out of bounds access (spotted by GCC13).

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 020b6e094f04b27e4127e7cf647bac0987aaa418
URL:    https://gitlab.winehq.org/wine/wine/-/commit/020b6e094f04b27e4127e7cf647bac0...

Author: Eric Pouech 
Date:   Tue Apr  4 19:02:43 2023 +0200

winedump: Fix out of bounds access (spotted by GCC13).

Anyway, it's a pain that we have to maintain two MS symbols
demanglers (this one and the one in dlls/msvcrt).

Signed-off-by: Eric Pouech

---

tools/winedump/msmangle.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/winedump/msmangle.c b/tools/winedump/msmangle.c
index f9440c04a45..4408e418191 100644
--- a/tools/winedump/msmangle.c
+++ b/tools/winedump/msmangle.c
@@ -573,10 +573,10 @@ static char *demangle_datatype (char **str, compound_type *ct,
     case '0': case '1': case '2': case '3': case '4':
     case '5': case '6': case '7': case '8': case '9':
       /* Referring back to previously parsed type */
-      if (sym->argc >= (size_t)('0' - *iter))
+      if (sym->argc >= (size_t)(*iter - '0'))
         return NULL;
-      ct->dest_type = sym->arg_type ['0' - *iter];
-      ct->expression = xstrdup (sym->arg_text ['0' - *iter]);
+      ct->dest_type = sym->arg_type [*iter - '0'];
+      ct->expression = xstrdup (sym->arg_text [*iter - '0']);
       iter++;
       break;
     default :