[newlib-cygwin/cygwin-3_6-branch] Cygwin: child_info: remove filler bytes

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=c64884cc06a7dda3727c1b74228256e20eab48ac

commit c64884cc06a7dda3727c1b74228256e20eab48ac
Author:     Corinna Vinschen <corinna@vinschen.de>
AuthorDate: Sun Jan 25 15:45:07 2026 +0100
Commit:     Corinna Vinschen <corinna@vinschen.de>
CommitDate: Mon Feb 2 18:13:54 2026 +0100

    Cygwin: child_info: remove filler bytes
    
    The filler bytes in child_info were only necessary for Vista to
    workaround a bug in WOW64. We just neglected to remove them so far.
    
    Fixes: a4efb2a6698f ("Cygwin: remove support for Vista entirely")
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
    (cherry picked from commit b0c13bcc7d1cbc5b8ec0f82523830abfed1eddac)

Diff:
---
 winsup/cygwin/local_includes/child_info.h | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/winsup/cygwin/local_includes/child_info.h b/winsup/cygwin/local_includes/child_info.h
index 25d99fa7de36..dc0b75dee694 100644
--- a/winsup/cygwin/local_includes/child_info.h
+++ b/winsup/cygwin/local_includes/child_info.h
@@ -33,7 +33,7 @@ enum child_status
 #define EXEC_MAGIC_SIZE sizeof(child_info)
 
 /* Change this value if you get a message indicating that it is out-of-sync. */
-#define CURR_CHILD_INFO_MAGIC 0x77f25a01U
+#define CURR_CHILD_INFO_MAGIC 0x3c5c4429U
 
 #include "pinfo.h"
 struct cchildren
@@ -111,7 +111,6 @@ public:
   void *stackbase;	// StackBase of parent thread
   size_t guardsize;     // size of POSIX guard region or (size_t) -1 if
 			// user stack
-  char filler[4];
   child_info_fork ();
   void handle_fork ();
   bool abort (const char *fmt = NULL, ...);
@@ -145,7 +144,6 @@ public:
   cygheap_exec_info *moreinfo;
   int __stdin;
   int __stdout;
-  char filler[4];
 
   void cleanup ();
   child_info_spawn () {};